Academic OneFile- Document Title: Author(s): Source: Document Type: DOI: Full Text: Page1 of 17 Dupuytren’sdisease:overview of a commonconnectivetissuediseasewith a focus on emergingtreatmentoptions Ardeshir Bayat, Alexis ThomasandDavid Warwick International Journal of Clinical Rheumatology.7.3 (June2012): p309. Article http://dx.doi.org.ezproxy2.library.arizona.edu/10.2217/ijr.12.25 Author(s): David Warwick [*] 1 , Alexis Thomas2 , ArdeshirBayat [*] 3 KEYWORDS : CCH; collagenase;Dupuytren;Dupuytren’sdisease;etiology; fasciectomy;fasciotomy;minimally invasive; nonoperative;PNF; radiotherapy;treatment History Felix Platterof Switzerlandappearsto havebeenthe first to documentwhat later cameto be calledDupuytren’s disease(DD) in his casereportpublishedin 1614of a stonemasonwith digital contracturesof his ring andlittle fingers.Unfortunately,he misattributedthe deformity to contractureof the flexor tendonsso wassupersededby later anatomistswho correctly delineatedthe fascialratherthantendinousnatureof the contractions[1] . The medical literaturehascreditedthe first descriptionof DD to the Frenchmilitary surgeonandanatomistBaronGuillaume Dupuytren(1777-1885)who publishedanaccountof his surgeryon his coachmanin the Lancetin 1834 [2] . However,it wasactually the EnglishmanHenry Cline who, in the yearof Dupuytren’sbirth, dissectedtwo hands with palmarfascialcontracturesandfirst correctlydescribedDD asa disorderof the palmarfasciaratherthanof the flexor tendonsaspreviouslythought[3] . Later, in oneof his lectures,Cline suggestedDD shouldbe treatedby open palmarfasciotomyand,in 1822,oneof his eminentstudents,Sir Astley Cooper,demonstratedthat percutaneous aponeurotomy(usinga Cooperknife) wasalsoa successfultreatment[3] . Dupuytrenis known to havevisited Cooperin 1826but did not perform his first operativereleaseof a fascialcontractureuntil 1831- he publisheda descriptionof this in 1834 [4] . Irrespectiveof which of theseearly surgeonsgainscredit for discoveringthe disease, they all (Platterexcluded)correctlynotedthe underlyinganatomyof the diseaseandsuggestedtreatmentsthat are still usedtoday. DD is a benignbut progressivefibroproliferative diseaseof the palmarfasciathat often startswith developmentof fascialnodules,which may progressto the formation of cordsalonglines of tensionwithin the volar surfaceof the hand.It may progressdistally into affecteddigits (often entwining the digital neurovascularbundleswithin spiral fascialcord extensions)andcanresult in severe,irreversibledigital contracturesandconsiderablelimitation of hand function [5] . It may presentin oneor both hands(althoughnot alwayswith symmetricaldiseaseprogression)and, althoughoften not thoughtof asa systemiccomplaint,is commonlyassociatedwith severalotherfibroproliferative disorders(Garrod’sknuckle pads[6] , Peyronie’sdiseaseof the penis[7] andLedderhose’sdiseaseof the plantar fascia) [1] . Strangely,despiteoften beingin direct continuity with diseasedfascia,it is thoughtnot to affect the transversepalmarfascialfibers or Skoog’sfascial fibers,which lie beneaththe spreadingplaneof the disease[8] , but affectsall otherpalmarfascialstructures,often sendingcontractilefibers into the skin (causinglocalizeddermal pitting). Thepalmarpretendinousfascialband,extendingfrom the mid-palmarcreaseto the digital base,becomesthe pretendinouscord; the transversefascialnatatoryligamentpassingat the baseof the digits andconnectingthe pretendinousbandsbecomesthe natatorycord; the fasciapassingfrom the baseof the digit distally to crossthe proximal interphalangealjoint (PIPJ)becomesthe centralcord; and,the spiral fibers that passfrom the metacarpophalangeal joint (MCPJ) distally and dorsally to insertinto the lateraldigital sheetsbecomethe spiral cords (with the lateralsheetsbecominglateralcords,which markedlycontributeto the PIPJcontractures)[9] . All of these contractilecordsenvelopthe digit andcanbe adherentaroundthe MCPJ,PIPJanddistal interphalangeal(DIPJ) joint capsules,further limiting full joint mobility. Thesecordscauseprogressivefixed flexion contracturesacrossthe involved joints andincreasinglylimited joint mobility. Longstandingflexion deformitieswill leadto secondary contractureof the joint, especiallythe PIPJ. Epidemiology & risk factors Academic OneFile- Document Page2 of 17 The prevalenceof DD variesby age,gender,geographicalorigin andethnicity [10] . Primarily, it is a diseasethat presentsfrom the fifth decadeonwardsbut hasbeennotedin a child asyoungas9 yearsold [11] . It is alsoa predominantlymaledisease,with male:femaleincidenceratiosrangingbetween15:1 and5:1 dependingon the age of comparedpopulations(the incidencein womenincreasessignificantly with age)[4] . Primarily a diseaseof NorthernEuropeanCaucasians(its geneticpreponderancein Scandinaviaandpeopleof the British Isleshasbeen postulatedto stemfrom early GermanicandCeltic tribal migration andresettlement)[9] , its prevalencedecreasesas oneexaminesevermoresoutherlyEuropeanpopulations,presentingonly sporadicallyin black African individuals [10,12] . It is alsocommonlyfound in white populationsin North America, AustralasiaandJapan(interestingly,it appearsrarely in China,perhapsdueto Japan’shistorical comparativeopennessto foreignersandhenceinterracial geneticmixing) [13] . Thereis an obviousgeneticcomponent,asobservedby twin concordancestudies,ethnic andfamilial clustering[14] ; however,the modeof inheritanceis variable:it presentsasMendelianautosomaldominancewith incomplete penetranceandhasalsobeendescribedasshowingcomplextrait with oligogenicinheritance[15] . DD alsoappears in individuals without a known family history of DD, so-calledsporadiccases[16] . In families with a strong expressionof the disease,DD tendsto presentearlierandprogressfaster(often termedthe Dupuytren’sdiathesis, first describedby Hueston)- unfortunately,thesegroupsalsotendto developaggressiverapid recurrence postintervention[17] . Specificcausativegeneticlinkage is slowly becomingclearer:the 6cM regionon chromosome 16q hasbeenpositively linked with DD [16] anda gene,IRX6, found within the sameregionhasbeennotedto be upregulatedin DD [18,19] . Studiesat the chromosomallevel arealsostartingto pay dividends:severalcell culture studieshaveshownchromosomalaberrations(trisomy of 7 and8, lossof Y chromosome[20] ) althoughtherehave alsobeensuggestionsthat thesefindings may bedue to cultureamplification of non-DD cells [18] . The etiology of DD remainscomplexandwithout an overarchingpatho-etiologicalmodelto tie all the contributing factorstogether(Figure 1). It hasbeenlinked with varying degreesof significanceto diabetesmellitus [21] , smoking [22] , excessiveconsumptionof alcohol [23] , elevatedserumlipid levels [24] , exposureto anti-epilepticmedications (previouslyit wascausallylinked with epilepsybut this appearsto havebeendisproven)[25] , local traumaticinjury (leadingto algodystrophy)[26] andoccupationalexposure[27,28] . It hasbeensuggestedthat someof theseapparent semi-causalassociationsareclosely linked with recurrentmicroangiopathicischemia,causingproductionof free radicals,which in turn stimulatecytokine releaseandfibroblast proliferation [29] . This freeradical theoryis supportedby a finding of sixfold higherhypoxanthinelevels (involved in the productionof oxygenfree radicals)in DD tissueswhencomparedwith healthypalmarfascia[30] . Othershavesuggestedthat DD pathogenicpathways may involve aberrantimmuneresponsemechanismsand alteredwoundhealing [18] . Immunologicalalterations associatedwith DD include higherautoantibodiesagainstcollagenI-IV in DD patients,which drop severalmonths after surgicalresectionof the diseasedtissues[31,32] ; andalterationsin HLA antigendistribution - a 2.3-fold increasedrisk of DD hasbeennotedin thosewith the HLA-DRB1*15 genotype[33] , althoughthe statistical significanceof otherHLA alterationsremainsunclear[18] . The alteredwoundhealinghypothesisis basedon the fact that both woundhealingandDD sharesimilar changesin biochemistry(alteredextracellularmatrix protein and proteinasemetabolism)andcollagenmetabolism,coupledwith the prevalencein DD of contractilefibroblastsalso found in active stagesof contractilewoundhealing,termedthe myofibroblast[18] . Cell biology Similar to the physiologicalprocessesinvolved in woundhealing,DD tissueshavedemonstratedincreasedfibroblast numbers[34] , differentiation of fibroblastsinto contractilemyofibroblasts[35] andupregulateddepositionof extracellularmatrix proteins(especiallycollagenIII) [36] . Luck wasthe first to describethe threedistinct histologicalstagesof DD [34] . Firstly, within the cellular, maximally biologically activeproliferative stage,thereis local fascial fibroplasiasecondaryto increasedfibroblast production,theseclusterinto characteristicnodulesbut are not affectedby any linear tissuestresses.Next, in the involutional stage,the fibroblastsdifferentiateinto myofibroblasts,which form alongthe palmaraxesof mechanicaltension:the intracellularactin microfilamentsare acteduponby a variety of cytokinescoupledwith the externalmechanicaltensiontriggering progressivecontractile behaviorandthe formation of DD cords.Finally, in the residualphase,the cellular elementsregressleaving the inelastic,relatively acellular,tendon-likecollagenstructuresthat crossthe small hand/digitaljoints causingthe Academic OneFile- Document Page3 of 17 pathognomonicfixed flexion cord contractures[34] . Grading * Rangeof movement A quick, simple assessment of diseaseseverityis providedby Hueston’stabletoptest,wherethe patientis askedto placethe affectedpalm flat on a tabletop;thoseableto do so still retainenoughpalmarflexibility to allow adequate handfunction andaredeemedto haveearly DD not meriting intervention.More extensiveDD canbe measured simply, objectively andreproduciblywith a goniometer,allowing accurateassessment of diseaseprogressor treatmenteffect.The lossof extensionin eachjoint is measured,following which the total loss(MCPJ+ PIPJ+ DIPJ) is summated.Tubianasuggestedfour categoriesof deformity - (stageI: 0-45´; stageII: 45-90´; stageIII: 90135´ and stageIV: 135-180´) [37] . Patientswith a severePIPJcontractureoften demonstrateassociated hyperextensionof the DIPJ (the bouttonieredeformity) in which the summativetotal extensionlossis not valid. Despitethis, goniometermeasurementsremainusefulasthey areobjectiveandthus minimize interobserver variability of assessment of diseaseprogression.However,total extensionlossis not a patient-relatedmeasureand the correlationbetweendeformity andfunction is weak [38,39] . Objectively measureddeformity doesnot appearto capturethe multifactorial natureof patient-experienceddisability. The involvementof multiple digits, which is commonin DD, canalsoconfoundthe correlationbetweendeformity andfunction [40] . * Generic hand function scores The relevanceof patient-relatedoutcomemeasuresis now broadlyaccepted.They providea quantitative measurementof diseaseimpact on handfunction andpatientquality of life andguidethe appropriatetiming of interventions.Thereareseveralscoringschemesavailablefor measuringhandfunction, suchasthe Disability Assessmentof ShoulderandHand (DASH) questionnaire[41] , QuickDASH [42] , Michigan Hand Score[43] andthe PatientEvaluationMeasure[44] . However,thesearegeneric,pandiseasemeasureswithout a specific focuson the changesfound in DD and hencethey arenot specificenoughfor the functional difficulties posedby the contracture. DD may causeonly oneor two functionalissuesin an individual; the scoringschemesinclude too many otherfactors so that evena largechangein the DD-relatedhandfunction will not influenceor alter the overall score.The creation of a validatedDD-specific patient-reportedquantitativescoringsystemwould be of considerableusein the clinical assessment of DD in the future. Indications for treatment Thereareno clear guidelinesfor treatmentasthe diseaseprogressesat a different rate(which remainsunquantifiable in the absenceof an objectivestagingsystem)in everyindividual. This alsoreflectson the variableexperienceof eachindividual whenaffectedby the disease.Theso-called’tabletoptest’,whenthe patientcannotflatten the downfacedhandon the table,is too basican indicatorprior to embarkingupontreatment.The testdependsupon hyperextensibilityof the MCPJbecauseevena severecontracturecanbe compensatedin this way. Additionally, the testdoesnot measurethe patient’sfunctionaldifficulties despitea positive tabletoptest.As a result,it is considered inappropriateto recommendtreatmentthat may haveadverseeventsand a potentialrisk of deterioratingthe patient’s condition,outweighingthe benefitsof any treatmentoption.Of note,is costimplicationsfor the privatepatientor the healthcareprovider,unlessthereis a clearbenefit from undertakinga treatmentthat is shownto objectively improve the degreeof functional impairmentcausedby the disease. The indicationsfor treatmentmay alsobe influencedby the rateof progression;a 90´ PIPJcontractureis technically difficult to correctsurgically. Thereforesurgery,if contemplated,shouldbe undertakenwhile the diseaseis at an earlierstageandsurgically simplerto undertake.Conversely,a 90´ MCPJcontractureis much earlierto correctso delayis not sucha concern.The risks andbenefitsof eachtreatmentoption shouldbeconsideredaspart of the processwhendecidingon the mostappropriatetreatmentmodality andsurgicalindicationsin an individual patient. Treatment overview It shouldbe recognizedthat DD cannotbe cured.Currenttreatmentoptionsmerelymanagethe consequences of the disease- the developmentof a contracture.The diseaseetiopathogenesisis unknownandwe remainunawareof the reasonsbehindinitiation andprovocationof contractureof the fascialbandsaffectedby the disease.Better Academic OneFile- Document Page4 of 17 understandingof the diseasemechanismandthe variability in patternandprogressionof DD may provide an opportunityfor developmentof a cure.The managementof DD, however,remainscontroversial,with a broadrange of treatmentsavailable:from the purely observational(’watch-and-wait’)approachin thosewith diseasenot currently causingnotableimpairmentof their handfunction to the nonoperative(e.g.,radiotherapy,steroids,injectable collagenaseClostridium histolyticum), throughto surgicalincision (percutaneousaponeurotomy)or excisionof DD contracturecords(fasciectomy,dermofasciectomy)andfinally to surgicalsalvageoperations(e.g.,digital amputation). No methodis curative;all aim to palliate the effectsof DD on handfunction. In addition,to date,therehasbeenno consensuson the preciseobjectivedefinition of recurrence,hamperingthe direct comparisonof the available treatmentmodalities.A recentsystematicreview of 2155referencesshowed69 papersthat met inclusion criteria, only threeof which providedlevel I evidence.Thereview authorsconcludedthat therewasno compellingevidence to supportonetreatmentover another,but did notea particularly high recurrencerateafter needlefasciotomy [45] . Figure2 suggestsa treatmentalgorithm for selectingthe mostappropriatetreatmentmodality andTable1 givesa comparativerelativevalueassessment of eachmanagementoption. Nonoperative treatment * Observation DD hasan uncertainprognosis.In someindividuals it progressesrapidly over a periodof months,while in othersit takesyearsfor a small degreeof progressionor remainsclinically static.Noneof the currently availabletreatments canguaranteepreventionof diseaseprogression,nor diseaserecurrence.In addition,following treatment,the disease may developde novo beyondthe treatmentfield or recurwithin the treatmentfield itself. As all availabletreatments carry somedegreeof risk, it remainssensibleto observethe diseaseuntil thereis an identifiable functionalproblem that outweighsthe risks of intervention. * Splinting Thereis no evidencethat the useof a splint (either staticor dynamic)altersthe rateof progressionor reversesthe contracture.Furthermore,postoperativesplinting hasbeenshownin randomizedcomparisonsto makeno difference to outcome[46,47] . * Radiotherapy Externalbeamradiotherapyis appliedover severaldaysuntil the planneddosehasbeenadministered(usually approximately15 Gy in five fractions)[201] . Themechanismof action of radiotherapyis not well understood[48] , but is thoughtto beeffective only in the early cellular stageof the diseasewhenthe fibroblastsareactively proliferating, the expressionof certaingrowth factors,suchasTGF-[beta]areupregulatedandthe monocytemacrophagesystem(involved in myofibroblastproliferation) is activated[49] . TheNICE commentedin its guidance that thereis limited evidencefor radiotherapyandthat further studiesareneededinto the short-and long-term efficacy andsafetyof the treatment[201] . The evidencefor radiotherapyis mainly derivedfrom the Germanliterature.Betz et al. retrospectivelyreportedthe long-termoutcomeof radiotherapyin 135 patientsover a follow-up periodof 13 years,finding 59% hadstable disease,10% showeddiseaseregressionand31% hadprogressivedisease(with the primary endpoint being Tubiana’smeasurementof diseasestage)[48] . Of the 87 patientsexperiencinglocal symptoms(paraesthesia, itching, tension/pressuresensation)pretreatment;16% showedcompleterelief, 18% goodrelief, 32% minor relief and14% hadno change.However,32% showedminor long-termradiogenicskin changeswith 23% showingdry skin and gradeI-II desquamation,7% demonstratingskin atrophywith gradeII telangiectasiaand2% showinglocal erythema lasting up to a yearpost-treatment.Approximately 20% requiredsecondarysurgicalmanagement,with 5% of these casesundergoingdelayedwoundhealing.Therewasno secondarymalignancynoted.In a randomizedtrial by Seegenschmiedt et al. , 129 patientsweregiven either30 Gy or 21 Gy andwere followed up for 1 year.Again, the primary endpoint wasimprovementin Tubianaclassification.Both groupsdemonstratedsignificantimprovementin scoring:56% (30 Gy) and53% (21 Gy) showeddiseasestageregression;37%(30 Gy) and38% (21 Gy) showed stabledisease;7% (30 Gy) and9% (21 Gy) hadprogressivedisease.Both groups(44%) hadmild acuteskin effects and5% showedchronicskin effects(dryness,desquamation,skin atrophyandsensoryalteration)[49] . Academic OneFile- Document Page5 of 17 Pohl et al. reportedon 110 patientsrandomizedto receivetwo different radiationdoses,finding no differencein side effectsof acuteor chronic skin changes([proportional to]15% for each).Therewere no efficacy endpoints or clear dosagedata[50] . Finally, a smaller,early seriesof 25 patientsby Fenneyreportedthat 75% showedsomeimprovementat 2-10-year follow-up and,of these,25% showedfull recovery,25% partial recoveryand25% showedonly slight improvement (recoverywasnot clearly defined)[51] . Peakimprovementoccurredby 6 monthsandthe sideeffectsof skin dryness or erythemawerenoted(with no referenceto how manysubjectswere affected). * Other methods Various agentshavebeentried without significantimprovementin DD digital contracture.Theseinclude IFNγ [52] , dimethyl sulfoxide [53] , vitamin E [54] , methylhydrazine[55] , allopurinol [56] , ultrasonictherapy [57] , physicaltherapy[58] andcalcium channelblockers[59] . Steroidinjection hasshownsomesuccessto dateon noduleresolution[60,61] andinjectablecollagenaseC. histolyticumon cord dissolution. * Steroid Injection Steroidinjectionsreducefibroblast proliferation andincreaseapoptosisin bothfibroblastsandinflammatorycells in DD [62] . Thereis someevidencethat treatmentmay be of clinical benefitalthoughsteroidinjections arenot commonlyconsidered.KetchumandDonohuereported63 patientswho hadan averageof 3.2 injections;97% regressed(definedby softeningandflattening of the injectednodules)by 60-80%but completeresolutionwasrare andtherewas50% recurrencewithin 1-3 yearsof the primary injection. Complicationsincludedskin atrophyand depigmentationin approximately50% of patients,resolvingwithin 6 monthsof final injection [60] . Injectable collagenaseC. histolyticum The sectionon the cell biology of DD describesthe dominantrole of abnormalcollagenproductionin DD. Therefore,direct dissolutionof the abnormalcollagenis a logical andenticing treatmentoption. It is this premise which led to the developmentof a specificcollagenase. * Structure & activity Xiapex´fi /Xiaflex ´fi (the UK andUS tradenamerespectively,hereafterreferredto asXiapex) is a combinationof two classesof purified collagenaseC. histolyticum(CCH) that arederivedfrom the fermentationof the bacteriumC. histolyticum. Thesecollagenases(AUX-1 and-2) hydrolysethe triple helical collageninto small peptidechains. According to the manufacturer’saccount,endogenoushumancollagenasethenactsto further lyse the collagen. Xiapex is leastactiveagainsttype IV collagen,which is containedin vascularbasementmembranesandthe perineurium.Thesestructuresarethereforerelatively safe;the type II collagencontainedin DD is alsodensely representedin tendon,tendonsheathandligament.Thesestructuresarethereforevulnerableto inaccurateinjection. This risk shouldbe mitigatedby experiencein injection proceduresin the hand,in the surgicalmanagementof DD andspecific training in the useof Xiapex. * Development Very early work with lessspecific clostridial collagenasein Peyronie’sdiseaseled to morespecific collagenase development[63] . Initial PhaseII trials by Badalamente,Hurst andHentz [64] showedclinical potential,which then led to PhaseIII randomizedefficacy studies[65,66] . ThesestudiessupportedsuccessfulUS FDA andEMA approvals in 2010and2011,respectivelyand this CCH is now commerciallyavailable. * Data CORD I study The CORD I study [65] involved 16 centersin the USA in a double-blind,randomizedcontrol multicenterPhaseIII Academic OneFile- Document Page6 of 17 studywith 308 patientsreceiving741 injections(444 collagenase;297 placebo).Approximately 64%of the collagenasegroupand6.8%of the placebogrouphad a correctionto within 5´ of neutral(p > 0.001).Theoverall rangeof movementimprovedfrom 43.9´ to 80.7´ (CCH) and45.3-49.5´(placebo).96.6%hadan adverseevent (CCH) versus12.2%(placebo),althoughmost weretrivial and transient(swelling, bruising,injection-sitepain, axillary tenderness)therewerethreemajor adverseevents:two flexor tendonrupturesandonecaseof complex regionalpain syndrome(CRPS). CORD II The CORD II wasa double-blind,randomizedcontrol trial of 66 patientsfrom five Australiancenters[66] . There wasa 70.5%decreasein joint contractureto within 5´ of neutral(CCH) comparedwith 13.6%(placebo;p [lessthan or equalto] 0.001).Themeanincreasein movementwasgreaterin the CCH group(35.4´) thanin the placebogroup (7.6´; p [lessthanor equalto] 0.001),with only onemajor adverseeventof a flexor tendonpulley rupture(no flexor tendonrupturesor allergic reactionswerenoted). Administration Experiencein the surgicalmanagementof DD andformal training in the administrationof collagenaseis mandatory. A technicaloverview is providedin Figure 3. The drug is providedin two vials, onecontainingCCH asa lyophilized powderandthe othercontaininga sterile diluent. Thecontentsof the vials aremixed andthe reconstituteddrug is administeredby carefulinjection into the palpablecord.The injectedvolumeis small (0.2 ml into PIPJcontractures to 0.25ml into MCPJcontractures)andaccurateinjection is essential.After administration,the cord may passively ruptureovernightprior to any manipulation.More commonly,the following day the digit is passivelyextended,the enzymaticallyweakenedcord contracturegenerallyruptureson digital extension,however,a secondor third injection, given at least30 daysapart,is sometimesrequired.At present,the manufacturersuggestsonly onecord to be injectedat eachclinic visit. Also, their protocolsuggestsa night splint to be worn anddaily prescribedhand exercisesto be undertakenfor 4 monthsfollowing successfultreatment. Recurrence Watt, Curtin andHentz followed up eight patientsfor 8 yearspost-Xiaflex injection (however,not all caseshad receivedthe sameCCH dose)[67] . Two patients(with MCPJcontractures)hadno recurrence.Of thosewith recurrence,four MCPJcontracturesworsenedfrom 9´ from full extensionat 1-weekpostinjectionto 23´ at 8 years andtwo PIPJcontracturesworsenedfrom 8´ from full extensionat 1 weekto 60´ at 8 years. The latestunpublisheddatapresentedat the AmericanSocietyfor Surgeryof the Hand [68] showeda recurrencerate at 2-5 yearspost-CCHinjection of approximately13% for MCPJand34% of PIPJcontractures. Side effects& complications Combinedresultsof the CORD I and II studiesfound that bruisingoccurredin 70% andhemorrhagein 38% of the injection sites.Skin tearsoccurredin at least5%. A rarebut importantcomplicationwasflexor tendonrupture, occurringthreetimes acrossPhaseI, II andIII studiesin 1082patients(0.3%).This wasdueto the similar collagen typesin both tendonsandDD, with presumedinadvertentinjection too deeply,directly into the flexor tendon.These rupturesall occurredwheninjecting within the proximal phalanxfor PIPJcontractures.It is now recommendedthat the injection be given no morethan4 mm distal to the proximal flexion creaseof the finger to avoid this complication. Otherrarecomplicationsincludeda singlepresentationof CRPS(0.1%) and onedigital nerveinjury (0.1%) in the 1082patientsin the two PhaseIII trials. Immunogenicity At 30 daysafter the first injection of Xiapex, antibodiesagainstAUX-1 (92%) andAUX-2 (86% of patients)were detectable.After four injections,all patientshadhigh antibodytiters againstboth AUX-I and-II. Neutralizing antibodiesto eitherAUX-I or -II weredetectedin 10 and21%, respectively.However,theseimmunogenicresponses did not appearto correlatewith clinically importantsideeffects.Mild pruritis occurredin 15% andat least5% demonstratedinjection-siteedema,local pain, localizederythema,peripheralswelling, upperlimb andaxillary pain, Academic OneFile- Document Page7 of 17 lymphadenopathyandassociatednodaltenderness.All sideeffectsweredeemedto be mild andtransient.Despitethe lack of anaphylaxissofar (in any trials to dateand sincethe increasinglywidespreadcommercialusageof the drug), severeallergic reactionremainsa possibility (andthuscountermeasures shouldbe availableprior to its administration). Surgical management * Percutaneousneedlefasciotomy This procedureinvolves the physicaldisruptionof a discreteDD cord via multiple needlepassesthroughthe cord fibers [69] . The skin is anesthetizedwith ethyl chloride or with a small bleb of intradermallignocaine;however,the digit itself shouldnot beanesthetizedto enablesensationof proximity to the digital nerve.A fine needleis passed throughthe skin andinto the cord,with the patientbeingaskedto gently flex andextendthe digit prior to cutting with the needleto ensurethereis not over-penetrationinto the underlyingflexor tendon.The cord is ’peppered’ repeatedlywith the needle(i.e., piercedmultiple timesaroundthe puncture-siteregion),the finger beingheld passivelyin extensionto maintaintensionwithin the fascialcord.The tensionreducesrisk to the underlyingdigital nerveandflexor tendonwhilst inducingrupturewhenenoughcollagenfibers havebeendisrupted.Severaldigits can be treatedat the sametime [70] . The advantageof percutaneousneedlefasciotomy(PNF) is rapid recoveryandthe low costof a simple office-based intervention.In the only randomizedstudy(n = 166), van Rijssenet al. comparedPNF to openfasciectomy,finding a 63% improvementin the total passiveextensiondeficit with PNF anda 79% improvementwith openfasciectomy; the complicationratefor PNF was0% comparedwith 5% for surgery[71] . Recoveryof function wasquicker for PNF, with full handuseat 1 weekpost-PNFversus27-56dayspost-limitedfasciectomy[71] . In otherstudies,a 72% early ’improvement’in 171 patientswasreported[72] , andBadoiset al. reportedan 81% improvementin 138 patients[73] . Digital nerve & tendon damage The risk variesbetweenstudiesfrom 0% [71,72,74] to 2% [73] . The injuries were,with oneexception,from digital ratherthanpalmarneedling.This higherrisk with digital PNF andthe consistentlybetterresultsin the literaturefor MCPJversusPIPJcontracturereleasesuggestthat the techniqueis bestreservedfor MCPJcontractures[75,76] . Skin tears Badoiset al. reportedskin tearsin 16% of 138 patients[73] ; van RijssenandWerkerreportedtearsin 46%of 60 patients[76] . Recurrence As the cord is only rupturedratherthanfully removed,the recurrencerateis substantiallyhigherthanother modalities.Prospectivestudiesreporta recurrencerequiring surgeryof 20% at 2 years[74] , 65% at 33 months[76] , 58% at 3.2 years[77] , 41% at 5 years[72] , and 50%at 5 years[73] . The NICE [202] andrecentauthors[74] supportthe useof this techniqueasit is simple andsafe,particularly for older patientsunsuitablefor moremajor surgery. * Closed fasciotomy This is a very similar techniqueto PNF,using small single-scalpelstabincisionsratherthanmultiple needlespassing througha discreteDD cord underlocal anaesthetic.Unsurprisingly,againthis is moresuitablefor the MCPJrather thanPIPJcontracture,with approximately43% recurrenceof MCPJcontracturesat 5 years[75,78] . * Fat grafting Academic OneFile- Document Page8 of 17 Hovius et al. recentlydescribedan extensivepercutaneousaponeurotomycoupledwith filling of the resultantdefect with autologousfat aspirate.Therationalebehindthis methodwasthe known positive regenerativefat stemcell effect in softeningscars,the possible’fire break’effectof a fat graft betweenthe rupturedDD cord fibers andthe provision of replacementsubcutaneousfat bulk to the deficientDD-affectedareas[79] . In 99 patients,flexion contractureimprovedfrom 37 to -5´ from neutralat the MCPJandfrom 61 to 27´ from neutralat the PIPJ.Around 95% of patientsweresatisfiedandnormalhanduseresumedwithin 2-4 weeks.Complicationsincludedonedigital nerveinjury, onepostoperativewoundinfection andfour casesof CRPS.Follow-up in this studywasonly 44 weeks, so longerterm durability andits role comparedwith othertechniquesneedsfurther study [79] . * Limited fasciectomy,dermofasciectomy & grafting Theseopentechniquesinvolve variableremovalof the macroscopicallyinvolved fascia;in limited fasciectomyonly apparentlydiseasedfasciais resected;whereasin dermofasciectomyall diseasedpalmarfasciais excisedalongwith any overlying involved skin. It is postulatedthat the potentialfor recurrencein limited fasciectomyis harboredin residualfascialconnectionsto the skin andwithin the lateraldigital sheets,to which accessis restricted.The extent of limited fasciectomyresectionis variable,dependingon the preferenceof the surgeonandthe distribution or severityof the disease.Oneor severalsmall segmentscanbe removedthroughsmall incisions,breakingthe continuity of the cord [80] . Alternatively, the entiremacroscopicallyvisible cord is removed.The degreeof correctioncorrelateswith the preoperativedeformity [81] . Somesurgeonsalsoutilize adjunctivereleaseof the contractedPIPJcapsule.However,whilst increasingcorrectionperioperatively,this may causepain, stiffnessand joint instability, with no strongevidenceof durablepostoperativecorrection[82] . Dermofasciectomywasfirst recommendedby Huestonin 1984.Excision of the skin aswell asthe underlying diseasedfasciaallows removalof all the DD collagenfilamentsextendingbetweenthe DD fasciaandskin, minimizing the risk of recurrence[83] . Theresultantskin defectscanbe primarily closed,partially left opento close by secondaryintention,suchasthe McCashtechniqueor graftedwith eitherautologousskin or with a growing numberof biosyntheticor biological skin substitutegrafts.Theliteraturedemonstrateslow recurrenceratesfollowing dermofasciectomywith skin grafting. Tonkin et al. reportedno appreciablerecurrenceover 9-90 monthfollow-up in 35 patients[84] . Armstronget al. reporteda recurrencerateof 11.6%out of 103 sampledpatientsat meanfollow-up of 5.8 years[85] . Brotherstonet al. reported0% recurrencein 34 patientsat meanfollow-up of 100 months[86] . While thereareno randomizedstudies(to removecaseselectionor technicalskill bias),theseresultssuggesta reducedrecurrencecomparedwith any otherneedleor surgicalintervention. Skin closure The palm canbe primarily closedor left partially opento healby secondaryintention [87] . Clinical experienceshows that small defectsin the digits will alsoheal uneventfullywhenleft open.Thereareseveralwaysto closethe skin, including Z plasty [88] , broadlaterally basedV incisions [89] , V-Y advancementflaps [90] andlocal rotationflaps [91] . A randomizedcomparisonof longitudinal incision closedwith Z-plastiesor a modified Brunerincision closed by V-Y plastiesin 79 patientsfound a nonsignificantdifferencein recurrenceratesat 2-yearfollow-up (33% with modified Bruner;18% with Z-plasty) [92] . In anothercomparisonof closuretechnique,79 patientswere randomized to eitheropenfasciectomywith primary Z-plasty closureor dermofasciectomywith insertionof a ’firebreak’graft (a full thicknessskin graft that is postulatedto breakthe line of DD recurrencevia excisionof overlying presumeddiseasedskin andinterpositionof healthyskin graft that blocks diseasespread)[83] . No significant improvementwas notedin recurrenceratesat 3 yearswith fire-breakgraftsover Z-plastyclosure[93] . In anotherrandomized comparisonof direct closureof a transversepalmarwoundversusfull thicknesshypothenarskin graft insertionin 27 patients,a significantly improvedrecurrencerateat a meanof 2.2 yearswasnoted(50% recurrencein primary closuregroupvs 15% in the graftedgroup) [94] . Finally, asan alternativeto skin grafting in advancedDD with postfasciectomydigital skin defects,simple local transpositionflaps, suchasthe Jacobsenflap, havebeenfound to be very effective [91] . Recovery rates Returnto work is important,particularly whencomparingtreatments.Percutaneoustechniquesarelikely to havean importantclinical advantagein this regard.Tonkin et al. reporteda returnto manualwork at 8.5 weeksfor fasciectomy(comparedwith 8.9 weeksfor skin grafts) and3.8 weeksfor clerical work (comparedwith 5.7 weeksfor Academic OneFile- Document Page9 of 17 skin grafts) [84] . Complications Commonlynotedsurgicalcomplicationsinclude pain, infection, scarring,bleeding,hematomaformation,damageto nervesor blood vesselsandCRPS.The digital nervesarevulnerablein DD surgery:authorshavereportednerve injury in 1.9% [95] , 5% [71] and 7.7%,respectively[96] . In a study of 253 patients,Bulstrodeet al. reportedsix nerve injuries, onearterialinjury, 24 infections,six casesof CRPSandfive hematomata;the complicationrateappearedto correlatewith deformity [97] . Denkler reviewedthe Englishliteratureandfound that arterialinjury is ten-timesmore likely, andnerveinjury five-timesmorelikely, with surgeryfor recurrentdiseasethanfor primary disease[98] . Recurrence The reportingof recurrenceis confoundedby the absenceof a clear definition of recurrence.Furthermore,it canbe difficult to distinguishbetweenrecurrence(return of diseasein a previouslytreatedsite) or extensionbeyond previouslytreatedmargins(appearanceof diseasein a new site). Somemight regardrecurrenceasthe mere appearanceof anothernodulein the treatedsite; othersmight expectfurther treatmentbeforedefining recurrence. Standardliteraturedefinitions, andmorerandomizedtrials with prolongedfollow-up, would help comparerecurrence ratesbetweentreatments.It is generallyheld that recurrenceincreaseswith time; a systematicreview by Beckerand Davis reportedrecurrenceratesof 0-71% [45] . Bulstrode,JemecandSmith reportedrecurrencein 33% of patients followed up for 9.4 years[97] ; and,Tonkin reported46.5%recurrenceat a meanfollow-up of 38.8months[84] . * Postoperative splinting Thereis no clearevidencethat splinting is neededaftersurgery.Identification of which patientsmay benefitfrom splinting and the durationof any suchtreatmentis arbitrary andis a matterof clinical judgmentby the surgeonand handtherapist. * Salvageprocedures Severecontracturesthat havefailed to respondto surgery,or thosewhich haverecurreddespiteskin grafting, may be consideredfor a salvageprocedure:eitherjoint arthrodesisor digital amputation.The goal of arthrodesisis to fuse the affectedjoint, usuallythe PIPJ,into a betterfunctional position [99] . Without gainingsucha position,the patient handfunction andthusquality of life, is greatlyimpairedandamputationmust be considered[38] . Onceall otherDD managementoptionshavefailed, partial or completedigital amputationcanbea positive step,allowing the unaffectedfingers to be freedfor usein daily activitiessuchaswriting, personalhygieneactivities andsports, reinvigoratingpatientquality of life. However,the sideeffectsof amputation,which include cold intolerance, phantompain, terminal neuroma,grip weaknessandthe psychologicalreaction,shouldnot be underestimated. * PIP contracture Prolongeddeformity of the PIP joint becauseof a cord passingin front of it canleadto secondarycontractureof the PIP joint. ThePIP joint may still not straightenfollowing thoroughsurgicalremovalof the DD tissues.The managementof this is controversial.The PIP canbe releasedbut that may lead to pain, recurrence,slower rehabilitationand,on occasions,hyperextensionlaxity. Although thereis no consensus,many surgeonswill accept the correctionachievedby removalof the Dupuytren’scord without needfor further surgicalattentionto the PIP joint, whereasotherswill releasethe joint [100] . An externalfixator is a techniquethat hasbeenproposedasa potentialmethodof correctingPIP flexion contractures andcanbe usedeitherbeforeor after the formal Dupuytren’ssurgery[101] . Conclusion & future perspective Our understandingof the complexbasicscienceandnew managementoptionsof this prolific, fibroproliferative disorderhaveincreaseddramaticallyover recentyears.Despitethis, the gold standardtreatmentremainsthe sameas that previouslysuggestedwhen the diseasewasfirst discovered(surgicalexcisionof the diseasedpalmarfascial Academic OneFile- Document Page10 of 17 cords).New nonsurgicaloptions,suchasinjectablecollagenase,give hopethat the managementof this disorderwill showincreasedeaseof treatmentadministrationandextensionof disease-freeremissionperiodsprior to the often inevitablediseaserecurrenceandmay alsoprovidedecreasedtreatment-associated morbidity andhealthcarecosts. The diseasestill remainsincurableandthis will continueto be the focusfor future research.Despiteimportantrecent progressin coalescingthe ever-growingbasicscientific understandingof the mechanismsunderlyingDD into a cohesivepathophysiologicaldiseasemodel,therearestill questionsthat needanswering:What actually causesDD? Canwe designa DD-specific measurethat correlatesobjectivedeformity with patient-perceivedhandfunction? What is the most cost-effectivemanagementoption in the currenttreatmentarmory?Canwe createa drug that inhibits the contractileactionsof myofibroblasts?Could we useour understandingof the geneticbasisof the disease to preventdiseaseonsetin thosewith familial Dupuytren’sdiathesis?Could the creationof an overarchingpathoetio-physiologicalmodelallow usto developa diseasecure? Until thesequestionsare answered,the clinician is left with a broadrangeof effectiveextemporizingtreatmentsto choosefrom, which canallow a patient-centerdapproachto the successfulmanagementof DD. Table1. Relativevalueof eachtreatmenttechniquefor the managementof Dupuytren’sdisease. Ease Difficult + Method Easy +++++ Steroid +++++ PNF ++++ Radiotherapy+ Fasciotomy +++ Fasciectomy++ Skin graft + Collagenase +++ Evidence Weak + Strong +++++ + +++ + ++ +++ +++ ++++ Efficacy Efficacy Safety Cost Ineffective + High + Low Hazardous + Expensive+ Effective +++++ Safe+++++ Cheap +++++ +++++ Unknown +++ ++++ Unknown + ++ +++ ++ Unknown Unknown + Unknown ++ +++ +++ ++ ++ ++ ++ +++ ++++ ++ + ++++ +++ +++ + ++++ Efficacy Low + High +++++ Unknown ++++ Unknown +++ ++ + ++ Thetechniqueshouldbe tailored to the individual’s functionaldemandsand specificnatureof the diseaseas different patientsand different cords require differenttreatments. PNF: Percutaneousneedlefasciotomy. Executivesummary History * Dupuytren’sdiseasewasfirst describedby Platterin 1614,thenin 1822by Cooper. * It waspopularizedby Dupuytrenin 1834. * Benign progressivediseaseof the palmarfascia. * Associatedwith fascialdiseasein the foot (Ledderhose’s)andpenis(Peyronie’s). Epidemiology& risk factors * Male predominancein youngerpatients. * More prevalentin northernEuropeancaucasians. * Variable geneticpenetrance,worsein thosewith Dupuytren’sdiseasediathesis(originally describedby Hueston). * Complexetiology, associatedwith diabetes,anti-epilepticmedications,trauma,alcohol consumptionand Academic OneFile- Document Page11 of 17 hyperlipidemia. Cell biology * Increasedfibroblast numbersandactivity. * Threestagesof diseaseformation (Luck’s hypothesis):local fascialhyperplasia,differentiation into myofibroblasts andfinally developinginto hypocellularcollagencords. Grading * Tabletoptest(originally describedby Hueston). * Total lossof extensionmeasuredwith goniometer(advocatedby Tubiana). * Handfunction scores. Nonoperativetreatment * If no functionalproblems,perform regularobservationratherthantreatment. * Steroidinjection canreducenodules. * Radiotherapymay reduceprogressionbut evidenceis weak. * CollagenaseClostridium histolyticum(Xiapex´fi ): - Temporarysideeffectscommonbut importanteffectsrare - 20-30%recurrenceat 3 years - Lysescollagenin Dupuytren’stissue - 65-70%havea full correction;highestsuccessin cordsacrossmetacarpophalangeal joints Surgical management * Percutaneousneedlefasciotomy:high early successrateand complicationsrare;but high recurrencerate; particularly suitablefor tight cordsacrossmetacarpophalangeal joints in lower-demandpatients. * Closedfasciotomy:simplebut high recurrence. * Fasciectomy:varying amountsof tissuecanbe removed;surgicalcomplicationsmay occur;different techniques availablefor skin closure. * Dermofasciectomyandskin grafting: lowestrecurrenceratebut complexsurgery. CAPTION(S): Figure1. 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Needlefasciotomyfor Dupuytren’scontracture.Interventionalprocedureguidance43 (2004). http://guidance.nice.org.uk/IPG43 Author Affiliation(s): [1] Departmentof Orthopaedics,University of Southampton,UK. davidwarwick@handsurgery.co.uk [2] Plastic& ReconstructiveSurgeryResearch,Schoolof TranslationalMedicine,University of Manchester, ManchesterInterdisciplinaryBiocenter,131 PrincessStreet,Manchester,UK [3] ManchesterAcademicHealthScienceCentre,Departmentof Plastic& ReconstructiveSurgery,University Hospital of SouthManchesterNHS FoundationTrust,WythenshaweHospital, SouthmoorRoad,Manchester,UK. ardeshirbayat@manchester.ac.uk Author Note(s): * Author for correspondence Financial & competing interests disclosure D Warwick hasreceivedconsultancyfeesfrom Pfizer in considerationof provision of training material and academic/marketingadvice,and honoraria for lectureson Dupuytren’sdisease.A Bayathasreceivedan investigator award from Pfizer. Theauthorshaveno other relevantaffiliations or financial involvementwith any organizationor entity with a financial interestin or financial conflict with the subjectmatteror materialsdiscussedin the manuscript apart from thosedisclosed. No writing assistancewasutilized in the production of this manuscript. David Warwick, Alexis Thomas,Ardeshir Bayat Source Citation (MLA 7th Edition) Bayat,Ardeshir,Alexis Thomas,andDavid Warwick. "Dupuytren’sdisease:overview of a commonconnective tissuediseasewith a focuson emergingtreatmentoptions."International Journal of Clinical Rheumatology7.3 (2012): 309+. AcademicOneFile. Web. 7 Jan.2013. DocumentURL http://go.galegroup.com.ezproxy2.library.arizona.edu/ps/i.do?id=GALE% 7CA292275106&v=2.1&u=uarizona_main&it=r&p=AONE&sw=w Gale Document Number: GALE|A292275106 Top of page