L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Pediatric Rheumatology L. Nandini Moorthy, MD MS Assistant Professor of Pediatrics Chief, Division of Pediatric Rheumatology University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School New Brunswick, New Jersey, USA Case 1: One swollen joint A three year old Caucasian girl with a one month history of swollen left knee No history of fevers No rash No weight loss No other joints are involved CBC and differential within range CMP, ESR, CRP, Ig within range LDH within range ANA titre 1:320 RF negative Most likely diagnosis is Oligo-articular onset JIA ~Pauciarticular JIA (PaJIA) Commonest subtype (› 50%) 1-5 years of age Girls > boys Arthritis in ≤ four joints Large joints-knees, ankles, elbows Usually spares hips Rarely affects wrists, & small joints of hands & feet Differential Diagnosis of PaJIA Reactive arthritis Lyme arthritis Septic arthritis Trauma Neoplastic disease Dactylitis (< 4 ?psoriatic arthritis) PaJIA-Course and Complications Benign course, good prognosis Recurrences ~ 20% May progress to extended-oligoarticular arthritis requiring aggressive treatment Discrepancy in limb lengths Persistent inflammation Orthotic/surgical correction Fixed flexion contractures PT & OT L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Case 2: Many swollen joints Consider the case of a 6 year old girl who presents with multiple swollen joints, morning stiffness and mild anemia Most likely extended Oligoarticular JIA~Polyarticular JIA (PoJIA) 30% -40% of JIA Girls > boys Bimodal peaks: 2-5 years & 10-14 years Insidious onset, sometimes acute, with progressive involvement of >/=5 joints in the first 6 months In younger children, onset is usually pauciarticular AM stiffness and fatigue May have low-grade fever Arthritis intermittent or persistent RF+ve or RF-ve Small joints of hands & feet Tenosynovitis of flexor tendon sheaths PoJIA Labs - normal or suggest an inflammatory state Anemia High ESR Hypergammaglobulinemia Leukocytosis 5-10% RF + 40-50 % ANA + [Cassidy, 2001] Late-onset PoJIA Subset of RF+ girls mimics adult RA Chronic course into adulthood PoJIA-Differential diagnosis Infectious causes of polyarthritis Viral Septic Lyme Other Serum sickness Other rheumatic diseases Inflammatory Bowel Disease (IBD) Systemic Lupus Erythematosis (SLE) Dermatomyositis Sarcoidosis Scleroderma Spondyloarthropathies (enthesitis, axial involvement) Rarer causes Malignancy Other immunodeficiences PoJIA-Course & Complications L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Guarded prognosis Poorer prognosis Adolescent girls RF+ with late-onset, rapidly progressive erosive arthritis –often have RA like disease as adults Early involvement of small joints of hands & feet Persistent inflammation Subcutaneous nodules RF + Destructive hip disease among other joints & eventual disability Contractures & ankylosis Short stature (more in children) Often require joint replacements Chronic uveitis – 5% SoJIA- Course & Complications Systemic features may persist for 4-6 months with varying degrees of joint involvement Prognosis Complete recovery Polyarticular pattern Persistent inflammation &/ or chronic destructive arthritis Long standing SoJIA Micrognathia, c-spine fusion and destructive hip disease Short stature & FTT Uveitis - rare Amyloidosis -rare in the US Macrophage Activation Syndrome Enthesitis-related arthritis /Spondyloarthropathy Commonly complain of: Pain in the back & heel Morning stiffness Arthritis & /or enthesitis with any 2 of the following: Sacroiliac joint tenderness, Inflammatory spinal pain or both Positive family history Acute anterior uveitis Arthritis onset in boys > 8 yrs HLA-B 27 (higher likelihood of developing debilitating ankylosing spondylitis) Pathogenesis of JIA Cytokine dysequilibrium -- increased IL-1, TNF Management NSAIDS Disease Modifying Agents (DRUGS) Joint Replacement Physical and Occupation therapy Ophthalmologic monitoring L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Social support, education and family counseling NSAIDS Naproxen Nabumetone Diclofenac Indomethacin Ibuprofen, Naprosyn and Tolmentin are approved for children Used for all types Usually sufficient for PaJIA, mild spondyloarthropathy & mild cases of other types. Follow LFTs, UA Watch for GI, skin and psychiatric symptoms Disease Modifying Anti-Rheumatic Drugs (DMARD) or Slow Acting Anti-Rheumatic Drugs (SAARDS) Cyclophosphamide Leflunamide (Arava) Thalidomide-in SoJIA Tacrolimus Novel Biologics Gold Autologous bone marrow transplantation –in severe cases of SoJIA Monitor- LFTs, CBC, UA, BP, neuropathy NOVEL BIOLOGICS Anti-TNF agents Etanercept is a recombinant fusion dimeric protein (sTNFR) Infliximab -Monoclonal Anti-TNF antibody (has murine componenmt) Combination of Etanercept and Methotrexate Adalimumab (Humira): Fully humanized TNF alpha Mab with human derived heavy and light chain variable regions and human IgG constant regions. Anakinra (Kineret): IL-1 Receptor antagonist blocks cellular activation Anti-IL-6R ab: Anti-IL-6 receptor antibody prevents the formation of IL-6/IL-6R complex and eventually inhibits the function of IL-6 in children with SoJIA Adverse events Cases 3, 4 and 5: The swollen joint All three children have an unremarkable exam except for arthritis Complete blood count and differential, electrolytes, blood urea nitrogen, creatinine, and urine analysis are within normal limits Erythrocyte sedimentation rate range from 30-40 mm/hour The X-rays of the respective joints show only soft tissue swelling They were all started on non-steroidal anti-inflammatory drugs Diagnosis and management Patient 3 tested positive for Lyme Western Blot IgG; Treated with oral Doxycycline for Lyme disease. Patient 4 had elevated Antistreptolysin-O titre and anti-strep-DNAse B antibodies and had normal electrocardiogram and echocardiogram; Started on oral Penicillin treatment and prophylaxis for Post-Streptococcal Reactive Arthritis. L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Patient 5 had stool culture positive for Salmonella; Treated with Amoxicillin for Reactive Salmonella Arthritis. Reactive & infection-related arthritis Viral: Ebstein Barr Virus, Rubella, Parvovirus, Hepatitis, Mumps, Herpes, HIV, Echovirus Bacterial: Poststrepococcal arthritis, Rheumatic fever, Gonococcal, Chlamydia, Yersinia, Salmonella, Shigella, Campylobacter, Mycoplasma, Clostridium Lyme disease Septic, Tuberculosis, Fungal, Protozoal Reiter’s syndrome Reactive arthritis Non-specific arthritis after an extra-articular infection with one of the arithritogenic bacteria such as Chlamydia, Shigella, Salmonella, Yersinia or Campylobacter Here the term encompasses arthritis related to extra-articular infections Berlin Diagnostic Criteria Typical peripheral arthritis PLUS Evidence of preceding illness Exclude juvenile idiopathic arthritis and other arthritis of known causes Usually clinical features characteristic of primary infection Should know the clinical findings of Acute rheumatic fever: erythema marginatum Diffuse rash Polyarticular disease Rash, pustule, and bulla Bull’s eye rash Case 6: A teenage Asian girl with 3 month history of malar rash She also presented with: Palatal ulcers Photosensitivity Fatigue Myalgias and arthralgias Mild anemia ANA titre of 1:320 Some facts Incidence: 0.36 -0.9 per 100,000 per year Prevalence: <1- 4.5% of patients in pediatric rheumatology Age: Childhood onset 15-17 %, Rare (but still occurs) below 5 years Sex: More in females (Male:Female ratio 1:4.5) In younger age group, the ratio is almost equal Race: African-American, Hispanic, Asian Genetics: Family and Twin studies Etiology: Unknown!!! Genetic-abnormalities in immune function regulationEnvironmental –Hormonal L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Clinical presentation Fever, fatigue, weight loss, irritability SKIN Malar rash-Fixed erythema, flat or raised, over the malar eminences, tending to spare the nasolabial folds Discoid rash-Erythematous raised patches with adherent keratotic scaling and follicular plugging; atrophic scarring may occur in older lesions Other types of rash, nail involvement, hair loss (alopecia) Renal involvement in SLE Clinical nephritis in 75% of children, blood in the urine (hematuria- cannot always see with your eye-need to get urine tests with your physician), swelling, high BP a) Persistent proteinuria greater than 0.5 grams per day or grater than 3+ if quantitation not performed OR b) Cellular casts--may be red cell, hemoglobin, granular, tubular, or mixed Serositis a) Pleuritis--convincing history of pleuritic pain or rubbing heard by a physician or evidence of pleural effusion OR b) Pericarditis--documented by ECG or rub or evidence of pericardial effusion Cardiac - inflammation of different parts of the heart (pericarditis, myocarditis,valuvilitis), Myocardial infarction Lungs Central Nervous System 20-40% of affected children, depression, difficulty in concentrating, cognitive impairment (~52% of children), lupus headache, seizures etc. a) Seizures--in the absence of offending drugs or known metabolic derangements; e.g., uremia, ketoacidosis, or electrolyte imbalance OR b) Psychosis--in the absence of offending drugs or known metabolic derangements, e.g., uremia, ketoacidosis, or electrolyte imbalance Laboratory exam General Hematologic disorder Hemolytic anemia--with reticulocytosis OR Leukopenia--less than 4,000/mm<>3<> total on 2 or more occasions OR Lyphopenia--less than 1,500/mm<>3<> on 2 or more occasions OR Thrombocytopenia--less than 100,000/mm<>3<> in the absence of offending drugs Evidence of immune dysfunction Bleeding and clotting abnormalities Liver functions Sedimentation rate (inflammation) Blood and protein in urine Low complements- C3, C4 Autoantibodies -ANA, Anti-ds-dna, ENA Antiphospholipids L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Immunologic disorder a) Positive LE cell preparation OR b) Anti-DNA: antibody to native DNA in abnormal titer OR c) Anti-Sm: presence of antibody to Sm nuclear antigen OR d) False positive serologic test for syphilis known to be positive for at least 6 months and confirmed by Treponema pallidum immobilization or fluorescent treponemal antibody absorption test Approach to management General Routine/flare-worsening Team approach Adequate rest Sun-protection Immunizations Prompt management of infection Subspeciality visits Call doctor prior to any procedure-may need extra antibiotics or steroids Evaluate mood (patients may get depressed!!!) MEDICATIONS Steroids Cyclophosphamide Methotrexate Cyclosporin Rituximab Hydroxychloroquine Hydroxychloroquine toxicity Prognosis Infections, steroid complications, atherosclerosis New treatments and better survival Survival has improved in the past 20 yrs 10-year survival approaches 90% Extent of organ involvement (renal, central nervous system), apparent vasculitis, and multisystemic character of the disease Sepsis (severe life-threatening infection) is the commonest cause of death Important determinants: families’ ability to cope, socioeconomic status, compliance, teen-related issues, contraception Atherosclerosis Case 7 Juvenile Dermatomyositis (JDM) Vasculitis frequent & often severe Calcinosis common in recovery phase Polymyositis uncommon Malignancy rare Epidemiology L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Incidence: 0.5 per 100, 000/year ~20% Onset in childhood 4-10 years; Boys 6 years; Girls 6, 10 years F:M - 1.4:1 to 2.7:1; higher for >/=10yrs Widely distributed Blacks > Whites Clinical features Constitutional: Fever 38-40C, easily fatigued, anorexia, malaise, wt loss MSKS: symmetric proximal- weakness of LE limb girdle; anterior neck flexors/back & abdo, Gowers Pelvic girdle- stairs, Trendelenburg- weak hip adductors Severe (10%) Threat of aspiration DTRs usually nl Clinical features Visceral vasculitis (pancreatitis, melena, hematemesis, perforation)- poor prognosis--rapidly leads to death Also gall bladder, bladder, uterus, vagina, testes, retinitis, mild GN Cardiopulmonary Lipodystrophy ~20% (assoc. with insulin resistance) Diagnosis Proximal muscle weakness Classic rash Elevated serum muscle enzymes Electromyographic changes Histopathology Lab tests Leukocytosis, anemia -rare unless GI bleed High CRP, ESR Microscopic hematuria IgA, IgG, IgE CPK, AST, Aldolase, LDH ANA ~10-85% MSA & MAA MRI T1-fibrosis, fat infiltration, atrophy T2-fat suppressed-edema/inflammation EMG Muscle biopsy Treatment Steroids Hydroxychloroquine Methotrexate, Cyclosporine, Cyclophosphamide, Azathioprine, anti-TNF IVIG Plasmapheresis L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Supportive care PT, OT Course & Prognosis Prodrome-progressive-persistent-recovery Monocyclic, Chronic ulcerative, Chronic non-ulcerative Poor: severe disease activity, cutaneous ulcerations, calcinosis, distal involvement, dysphagia/dysphonia, nailfold changes, noninflammatory vasculopathy, specific MSAs Long term survival >90% Rheumatology Case 8 3 year old boy with a 3 day history of swollen, painful ankles No fever Physical examination normal except for swelling, pain on motion, warmth, tenderness of both ankles Found on routine laboratory tests to have moderate hematuria, heavy proteinuria Vasculitis Characterized by size of vessel Large (Takayasu) Medium and small (Kawasaki, PAN) Small (SLE, JDM, serum sickness, hypersensitivity, HSP, neoplasm associated) Characterized by cellular infiltrate Giant cells (Takayasu, WG) Neutrophils with nuclear debris (HSP) Clinically distinct (HSP, Kawasaki, WG) Serologically distinct (ANCA associated – MPA, WG) Antineutrophilic cytoplasmic antibodies (ANCA)-cytoplasmic and perinuclear HSP At least one of the following 4 should be present: 1. Diffuse abdominal pain 2. Any biopsy showing predominant IgA deposition 3. Arthritis or arthralgia 4. Renal involvement (any hematuria and/or proteinuria) In the presence of Palpable purpura (mandatory criterion) Henoch-Schonlein Purpura Cutaneous manifestations occurs in 96-100% Palpable purpuric lesions Dependent/pressure bearing areas Acute, symmetric, erythematous, macular or urticarial Coalesce to form palpable purpura Occur in crops and change color from red to purple to brown Clinical Features GI involvement (1-4 weeks) in 75% Abdominal pain (80%): colicky, periumbilical L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Vomiting, abdominal distention Melena, hematemesis, ileus Submucosal bleeding Intussusception (3%), ileoileal (easily missed by barium enema) Mesenteric vasculitis Rare: pancreatitis, gallbladder hydrops, pseudomembranous colitis Genitourinary complications Musculoskeletal involvement (50-85%) CNS vasculitis Thrombotic complications Brain infarcts (IgA APLA) Renal disease in 47% NS Transient hematuria 97% in the first 3 months of disease Focal or segmental mesangial proliferation to cresentric 44% of children presenting with nephritic/NS –may have high BP Risk factors for renal disease:>4 years of age, GI bleeding, Purpura >1 month Risk factors for unfavorable renal outcome: Hypertension, Proteinuria, Nephritis, Renal failure at disease onset Renal failure can develop up to 10 years after onset 1-5% may develop ESRD Labs: High WBC, platelets, anemia, guaic +ve stools, high IgA, high IgA ANCA D/D- ITP, Acute post strep, SLE, Septicemia, DIC, HUS, Acute Hemorrhagic edema Opposite: IgA deposition in skin Recurrence is 16-40% (6wk-2yr) Prognosis is usually excellent Treatment Usually none or supportive with acetaminophen, NSAIDs Short term steroids (initially IV) for severe GI, urologic manifestations (no RPCT) 1-2 mg/kg/d for 1 week then taper over 2-3 wks Renal prophylaxis with steroids? Severe renal disease: pulse steroids, azathioprine or cyclophosphamide, urokinase plus warfarin, IVIG, plasmapheresis (Wang et al) Case 9 Kawasaki Disease An acute febrile illness of childhood with medium and small sized necrotizing vasculitis first described by Kawasaki in 1967 KD – other clinical Arthritis/arthralgia (acute, subacute, convalescent phases) Large weight bearing joints, PIPs (?edema) Meningitis, irritability L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Pneumonitis Iritis Gastroenteritis, watery diarrhea Meatitis, sterile pyuria, priapism Otitis, cough, coryza KD- other clinical features Hydrops of the gallbladder Encephalopathy, seizures, ataxia Intestinal ischemia, infarcts KD Phases Acute febrile period lasting approximately 10 days (range 5-25d). Associated rash, carditis, mucous membrane, conjunctiva, adenitis Subacute period of approximately 2-4 weeks Arthritis, perineal and extremity desquamation, coronary artery aneurisms Convalescent phase lasting months Nail changes, aneurisms, arthritis Pathogenesis Postulated theories Infectious/Viral Superantigen Cytokine related Aberrant immune response triggered by a pathogen acquired through respiratory route Oligoclonal antigen driven response Endothelial cell activation, CD68+ monocyte/macrophages, CD8+ (cytotoxic) lymphocytes, and oligoclonal IgA plasma cells appear to be involved. Subtle maturational defect in immune responsiveness Genetic variations in the receptor-ligand pair CCR5 and CCL3L1 (Burns et al) KD M>F 6-11 months Asians>Europeans Acute febrile, subacute, covalescent CAA in ~ 5%; many develop coronary artery ectasia Giant aneurysms (>= 8 mm) Stenotic leading to MI Rupture acutely or develop later thrombosis due to stasis of blood flow and the procoagulant endothelial surface ? Anticoagulant therapy GOALS OF TREATMENT CONTROL INFLAMMATION PREVENT ACUTE MORBIDITY, MORTALITY L. Nandini Moorthy, MD MS Handout- Peds Rheumatology o Coronary aneurysms o Peripheral gangrene o Myocardial infarct PREVENT CHRONIC MORBIDITY THERAPY ASA 80 to 100 mg/kg per day in 4 doses with IVIG for 3-14 days High-dose ASA and IVIG appear to possess an additive anti-inflammatory effect. Low-dose ASA (3 to 5 mg/kg per day) until no evidence of coronary changes For children with coronary abnormalities, aspirin may be continued indefinitely Naproxen IVIG (2 g/kg) with aspirin (50–80–100 mg/kg) given within 10 days of fever onset Second infusion of IVIG (2 g/kg) in addition to high-dose aspirin is strongly recommended in all children with persistent or recurrent fever How to treat the small group (3–4%) still remaining febrile? Either a third dose of IVIG (2 g/kg) Corticosteroids Cyclophosphamide, cyclosporin and ulinastatin Anti-TNF agents (Infliximab) o Weiss J, Eberhard A, Chowdhury D, Gottlieb B, J Rheum, 2004 IVIG TREATMENT OF KD:CLINICAL EFFECTS OF IVIG REDUCES CAA’S, MORTALITY, Newburger JW et al, NEJM 1991: 324:1633 REDUCES GIANT CAA’S, Rowley AH, Duffy CE, Shulman ST, J Pediatr 1988; 113:290 AMELIORATES DISEASE AFTER DAY 10, Marasini M et al, Am J Cardiol 1991; 68:796 o o o o o o Approximate 10% failure rate, 67% respond to retreatment, 22% of 2nd IVIG failures respond to 3rd Studies only show efficacy with regards to CAA if initiated before 12 days Toxicity < 30% side effects (aseptic meningitis, hyperviscosity syndrome, ? recurrence) blood product-historical problem with hepatitis C transmission Cost: $100 + per gram Case 10: 10 year old black male with cough and weight loss for one month Fever for one month Increasing tiredness and myalgias Asthma exacerbation Unable to exercise or play as much as he used to Palpable bilateral non-tender cervical lymph nodes Hepatomegaly with mild tenderness Mild wheezing on auscultation Lymphopenia and anemia Normal ESR, CRP 4.2 mg/dl L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Negative for HIV, Hepatitis A, B, C and Parvovirus and TB Serum calcium 9.1 mg/dl (8.5 - 10.5) Sarcoidosis Older vs. Younger children Asymptomatic Clinical presentation can vary greatly Older children --- multisystem disease similar to the adult manifestation, with frequent hilar lymphadenopathy and pulmonary infiltration. Early-onset childhood sarcoidosis --- triad of rash, uveitis, and arthritis in patients presenting before age 4 years. Lofgren's syndrome - EN, bilateral hilar adenopathy, joint symptoms Pediatric Sarcoidosis Lymphadenopathy -most common o Intrathoracic - 75 to 90% o hilar nodes bilaterally o unilateral enlargement o paratracheal nodes o Peripheral - cervical, axillary, epitrochlear, inguinal o Non-tender, non-adherent, with a firm, rubbery texture Chronic cough (2nd most common) Parenchymal disease (infiltrates, effusions, atelectasis), restrictive Half with pulmonary symptoms Dyspnea, cough, chest pain 20% with abnl CXR and minimal/ no symptoms Diagnosis Anemia ~ 5% Leukopenia ~ 30% Eosinophilia ~ 25% Thrombocytopenia High ESR with EN, acute phase Hypercalcemia, hypercalciuria ---2-63% High Bili, Alk phos Proteinuria ---30% ACE Kveim test CXR, Gallium BAL --- high Lymphocyte count and macrophages; high CD4/CD8 High IL-1B, IL-6, TNF alpha Anergy to PPD Biopsy- Non caseating granuloma Case 11: Is it a rash? Shiny, thickened and discolored skin Linear scleroderma/Morphea L. Nandini Moorthy, MD MS Handout- Peds Rheumatology Case 12: Should know Raynauds Blanching of hands Case 13: Systemic Sclerosis Major criterion - sclerodermatous skin changes affecting areas proximal to the metacarpophalangeal or metatarsophalangeal joints Minor criteria are as follows: Sclerodactyly Digital scars resulting from digital ischemia Bibasilar pulmonary fibrosis not attributable to pulmonary disease Diffuse: Interstitial pulmonary fibrosis; Anti Scl 70 ab Limited (CREST): Pulmonary hypertension; Anticentromere ab Other topics Hypermobility syndrome Functional joint complaints Disorders of connective tissue Marfan syndrome Ehlers-Danlos syndrome