ORIGINAL ARTICLE Likelihood of Surgery in Isolated Pediatric Fifth Metatarsal Fractures Susan T. Mahan, MD, MPH,* Jason S. Hoellwarth, MD,w Samantha A. Spencer, MD,* Dennis E. Kramer, MD,* Daniel J. Hedequist, MD,* and James R. Kasser, MD* Background: Fractures of the fifth metatarsal bone are common and surgery is uncommon. The “Jones” fracture is known to be in a watershed region that often leads to compromised healing, however, a “true Jones” fracture can be difficult to determine, and its impact on healing in pediatric patients is not well described. The purpose of this study was to retrospectively assess patterns of fifth metatarsal fracture that led to surgical fixation in an attempt to predict the likelihood for surgery in these injuries. Methods: A retrospective review was performed on patients aged 18 and under who were treated for an isolated fifth metatarsal fracture from 2003 through 2010 at our pediatric hospital. Patient demographics, treatment, and complications were noted. Radiographs were reviewed for location of fracture and fracture displacement. Patients and fracture characteristics were then compared. Results: A total of 238 fractures were included and 15 were treated surgically. Most surgical indications were failure to heal in a timely manner or refracture and all patients underwent a trial of nonoperative treatment. Jones criteria for fracture location were predictive of needing surgery (P < 0.01) but confusing in the clinic setting. Fractures that occurred between 20 and 40 mm (or 25% to 50% of overall metatarsal length) from the proximal tip went on to surgery in 18.8% (6/32) of the time, whereas those that occurred between <20 mm had surgery in 4.9% (9/184). This was a statistically significant correlation (P = 0.0157). Conclusions: Although fractures of the fifth metatarsal are common, need for surgery in these fractures is not. However, a region of this bone is known to have trouble healing, and it can be difficult to identify these “at-risk” fractures in the clinical setting. We found simple ruler measurement from the proximal tip of the fifth metatarsal to the fracture to help determine this “at-risk” group and found a significant difference in those patients with a fracture of <20 mm compared with those 20 to 40 mm from the tip; this can help guide treatment and counsel patients. From the *Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA; and wDepartment of Surgery, Metropolitan Hospital Center, New York, NY. There was no external funding source for this study. The authors declare no conflicts of interest. Reprints: Susan T. Mahan, MD, MPH, Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, 300 Longwood Ave, Boston MA 02115. E-mail: susan.mahan@childrens.harvard.edu. Copyright r 2014 Wolters Kluwer Health, Inc. All rights reserved. 296 | www.pedorthopaedics.com Level of Evidence: Level 3. Key Words: metatarsal fracture, Jones fracture, pediatric foot fracture (J Pediatr Orthop 2015;35:296–302) F ractures of the fifth metatarsal, in adults and children, usually unite following 6 weeks of casting.1,2 Fractures of the proximal metaphyseal-diaphyseal junction or proximal diaphysis—the Jones fracture—are known to be in a watershed region of bone perfusion, and as such, frequently have a less favorable course, often requiring prolonged immobilization or surgery to achieve union.2,3 This is thought to be due to a watershed region of poorly perfused bone.3–6 Existing diagnostic criteria are qualitative, often confusing or inconsistent among authors1–3 and can be even more confusing.4 Differentiating the “at-risk” fractures from the more routine aids patient counseling.2,7,8 Multiple classification systems have been proposed for fifth metatarsal fractures due to different clinical outcomes and therefore differing treatment recommendations based on the subtleties of location of the fracture.2,5,9 It is difficult in the busy clinical setting to remember and differentiate the important differences of any 1 classification with regard to the expected clinical outcome and recommended treatment.4 Some commonly used classifications are only applicable once initial management has failed, and thus cannot guide initial treatment and counseling. Other classification includes “zones” which may be confusing when a fracture line crosses into different zones.5 As such, a simple method of quantitatively identifying the “at-risk” fractures seems needed. Minimal attention has been given to these fractures in children. Herrera-Soto et al2 presented a classification for fifth metatarsal fractures in children (see classification in the Materials and methods section below). They note that some type II fractures (intra-articular) and most type III fractures are at risk for difficult healing and recommend a non– weight-bearing cast for those particular injuries.2 The primary purpose of this study is to retrospectively assess patterns of isolated fifth metatarsal fractures in the pediatric population, and to predict which injuries are more likely to undergo surgery. We hope to find an easier and perhaps quantitative way to determine which fractures are at risk for poor healing. The J Pediatr Orthop Volume 35, Number 3, April/May 2015 J Pediatr Orthop Volume 35, Number 3, April/May 2015 secondary purpose is to describe isolated fractures of the fifth metatarsal in a large pediatric population. METHODS Institution Review Board approval was obtained before the initiation of this study. A retrospective review was undertaken at our large pediatric hospital using the ICD-9 code for metatarsal fracture (825.25) and a search for the term “metatarsal” in the department of orthopaedic surgery’s electronic charting database. A total of 931 patients were seen from 2003 to 2010. Inclusion criteria were age 18 years or younger at injury, fracture isolated to fifth metatarsal, and the bulk of care received by our medical center. Exclusion criteria were patients with fractures of >1 metatarsal, multiply injured patients, syndromic or neuromuscular patients, and fractures resulting from tumors or cysts. These criteria produced our study cohort of 238 fractures. Average age is 12.8 years (SD = 2.84; range, 2 to 18 y) and boys comprise 55.9% (133/238) of the cohort. Chart review included appropriate demographics and fracture-related information, including whether initial management was casting or surgery, whether surgery was ever required, the indication for surgery, and relevant comorbidities. Radiographs were available in 238 patients and were reviewed for location of fracture lines, overall length of metatarsal, magnitude of displacement, translation, and angulation. Some patients had open physes and apophyses and in some older patients the apophyses were completely fused. Classification by Herrera-Soto et al2 were applied to each fracture as radiographs were available. Each fracture was evaluated for its distance from the proximal tip of the fifth metatarsal. Using the digital ruler the distance from the ossified tip of the proximal fifth metatarsal to the most proximal extent of the fracture was measured. The overall length of the metatarsal using digital ruler was recorded as well (Figs. 1, 2). The Herrera-Soto et al’s2 classification classifieds the fifth metatarsal fracture into 5 types. Type I fractures were apophyseal injuries or fractures at the base of the fifth metatarsal, also known as a “fleck injury.” Type II fractures were tubercle fractures with intra-articular extension, and can extend to the metatarsal-cuboid joint. Type III injuries are at the metadiaphyseal junction, also often known as the “Jones fracture.” They also included diaphyseal fractures (type IV) and metatarsal neck fractures (type V) separately. Differentiation between type II and type III fractures was not clarified. Data Analysis Statistical significance was set a priori at P < 0.05 (2-tailed). These variables were recorded as continuous data: age (y), degree if angulation of fracture, maximal displacement of fracture, distance of fracture from proximal fifth metatarsal tip, overall length of the fifth metatarsal, and time (wk) from injury to surgery. The distance of the fracture from the proximal fifth metatarsal tip was divided by overall length of the metatarsal to obtain the percentage length of the fracture on the fifth metatarsal. Copyright r 2014 Wolters Kluwer Health, Inc. All rights reserved. Surgery in Isolated Pediatric Fifth Metatarsal Fractures Data were compared between patients using Student t test in SAS 9.1.3 (Cary, NC). Categorical data were recorded based on the HerreraSoto classifications. Data were compared by analysis of variance in SAS, or if no more than 3 categories by Fisher exact test in SAS. The continuous data of distance of fracture from proximal fifth metatarsal tuberosity was categorized into 9 categories: 0 to 4.99 mm, 5.0 to 9.99 mm, 10 to 14.99 mm, 15 to 19.99 mm, 20 to 24.99 mm, 25 to 29.99 mm, 30 to 34.99 mm, 35 to 39.99 mm, and Z40 mm. The continuous data of percentage length of the fracture on the fifth metatarsal was categorized into 9 categories: 0% to 4.9%, 5.0% to 9.9%, 10% to 14.9%, 15% to 19.9%, 20% to 24.9%, 25% to 29.9%, 30% to 34.9%, 35% to 39.9%, Z40%. These were then compared based on the rate of surgery. Further dichotomization of these data was done, such that fractures of 0 to 24.99 mm from the proximal fifth metatarsal tuberosity were compared with those Z25 to 40 mm and > 40 mm, as well as those 0% to 24.9% from those 25% to 39.9% and >40%. Dichotomous data were also recorded for sex and surgery (yes/no). Comparisons were made using Fisher exact test in SAS. RESULTS Of the 238 fractures, 15 (6.3%) were treated operatively, whereas 223 were treated nonoperatively. Most surgical indications were failure to heal in a timely manner or refracture (Table 1). No patient had surgery necessitated by an open fracture or compartment syndrome. Of the 15 patients who underwent surgery, average age at time of injury was 15.1 years, whereas for those treated nonsurgically; average age was 12.7 years (P < 0.01). No one under the age of 11 years underwent surgery for his or her fifth metatarsal fracture. There was also male sex predominance in those treated surgically for this fracture, with 86.7% (13/15) boys, whereas those treated nonsurgically was more balanced with 53.8% boys (120/223); this was also significant (P = 0.0146). Herrera-Soto classification was applied to all fractures (Table 2). There was a statistically significant difference in Herrera-Soto classification for those treated surgically compared with those nonsurgically (analysis of variance, P < 0.001), which was maintained even when just the Herrera-Soto II were compared with HerreraSoto III fractures (Fisher exact test, P = 0.0109). Upon grouping fracture location based on distance from proximal fifth metatarsal by 5-mm intervals we found that as the fragment length became >20 mm, a substantial increase in surgery was seen (Fig. 3). We then grouped the patients into 3 groups based on the distance of the fracture from the proximal tip of the fifth metatarsal: <20 mm zone, 20 to 40 mm zone, and >40 mm zone. With those divisions, we found that 81.3% (26/32) fractures within a region of 20 to 40 mm from the tuberosity were able to be treated nonoperatively, compared with 95.1% (175/184) of fractures proximal to 20 mm (P = 0.0157). None of the 22 isolated fifth metatarsal fracture distal to 40 mm had surgery in this series. www.pedorthopaedics.com | 297 Mahan et al J Pediatr Orthop Volume 35, Number 3, April/May 2015 FIGURE 1. Radiographic images showing the right foot of a 13-year-old boy who sustained a proximal fifth metatarsal fracture that went on to symptomatic nonunion. Oblique views show before surgery (A) and after surgical fixation (B). Note the distance from the proximal tip of the fifth metatarsal to the fracture site is 7.3 mm. This puts him in the lower risk group for likelihood of surgery. The age of patients who sustained fractures in the <20 mm zone were significantly different from those in the 20 to 40 mm zone and this was true for those treated both nonsurgically and surgically. For all patients, those who had fractures in the <20 mm zone had a mean age of 12.4 years (SD = 2.5) and those who had fractures in the 20 to 40 mm zone had a mean age of 15.1 years (SD = 3.7) (Student t test, P < 0.001). For those treated surgically, patients in with fractures in the <20 mm zone had a mean age of 13.7 years (SD = 0.93) and those in the 20 to 40 mm zone had a mean age of 17.4 years (SD = 0.64) (Student t test, P < 0.001). There were 32 patients with a fracture in the 20 to 40 mm zone. None of the patients aged 15 or under (n = 6) had surgery for a fracture in the 20 to 40 mm zone in our series (Table 1). In the 22 patients over the age of 15 with a fracture in the 20 to 40 mm zone, 27.3% (6/22) had surgery. When patients over the age of 15 only are included, no patients in the <20 mm zone had surgery (0/ 22), 27.3% of the patients in the 20 to 40 mm zone had surgery (6/22), and no patients in the >40 mm zone had surgery (0/6) (P = 0.0047). We also determined if patients with fractures in the 20 to 40 mm zone had different indications for surgery and 298 | www.pedorthopaedics.com time from initial injury to surgery than those in the <20 mm region (Table 1). There were 3 patients who had surgery for refracture, where the initial injury was treated nonsurgically, 2 in the <20 mm zone and 1 in the 20 to 40 mm zone. For the remaining 12 patients treated surgically, only 1 patient had surgery <3 weeks after injury and they had a fracture in the 20 to 40 mm zone. As 1 patient with a fracture in the 20 to 40 mm zone had surgery almost immediately (1 wk after injury), we revisited our analysis omitting this patient. When comparing the patients treated at least 3 weeks after their injury and due to failure to show satisfactory healing, those with fractures proximal to the 20-mm threshold were treated nonoperatively 95.1% (175/ 184) and those in the 20 to 40 mm zone were treated nonoperatively 83.9% (26/31) (P = 0.035). We also assessed fracture location based on a percentage of the overall metatarsal length. The average metatarsal length in this group was 71.6 mm (SD = 9.8) and in patients over age 11 years, the average metatarsal length was 75.1 mm (SD = 7.2). When the percentage of metatarsal length was group by 5% increments, results were similar to the grouping by 5-mm increments. A slightly cleaner bimodal picture was noted, however, when groups were put into 3 zones (< 25%, 25% to 50%, Copyright r 2014 Wolters Kluwer Health, Inc. All rights reserved. J Pediatr Orthop Volume 35, Number 3, April/May 2015 Surgery in Isolated Pediatric Fifth Metatarsal Fractures FIGURE 2. Radiographic images showing the left foot of a 16-year-old boy who sustained a proximal fifth metatarsal fracture. He was non–weight-bearing on this leg for 8 weeks before radiographs failed to show satisfactory healing and surgery was recommend. Oblique views show before surgery (A) and after surgical fixation (B). Note the distance from the proximal tip of the fifth metatarsal to the fracture site is 32.9 mm. This puts him the higher risk group for likelihood of surgery. >50%) the analysis was very similar from that based on length of fracture from the proximal tip of the metatarsal. When angulation (degrees) and displacement (mm) of the fracture fragment were compared between the group who had surgery and the group who did not, no difference was seen. Fifteen of our patients had surgery for their fifth metatarsal fracture; 10 different surgeons were involved. In all cases a 4.0- or 4.5-mm screw was used, usually cannulated. A washer was utilized in some cases. In all but 1 case the screw was placed from the proximal tip of the fifth metatarsal in an intramedullary antegrade manner. Complications were seen in 3 patients: 1 had infection of the screw and excision of the screw and proximal fragment; 1 had screw migration and revision with removal of the screw, excision of the proximal metatarsal, and reattachment of the peroneus brevis tendon; and 1 other patient had nonunion and screw migration also with screw removal, proximal fragment excision and reattachment of the peroneus brevis tendon (Table 1). The complications were all Copyright r 2014 Wolters Kluwer Health, Inc. All rights reserved. in proximal avulsion-type fractures (< 20 mm from proximal tip of the fifth metatarsal). Two additional patients had elective symptomatic screw removal. All other patients healed uneventfully. DISCUSSION Isolated fractures of the fifth metatarsal must be managed based on their location. The greatest attention has been given to fractures of the proximal metaphysealdiaphyseal junction or proximal diaphysis and the tuberosity.1 Although Jones was the first to describe the fracture (and ultimately gave his name),10 its exact location has been the topic of some debate, with some authors noting it as the proximal diaphysis2 and others noting it as the metaphyseal-diaphyseal junction.1,3,4 It is important to differentiate the “Jones” fracture from the more proximal tuberosity fracture. Some authors have noted that this differentiation is merely semantics, as both areas can be troublesome with healing2–4; however, www.pedorthopaedics.com | 299 J Pediatr Orthop Mahan et al Volume 35, Number 3, April/May 2015 TABLE 1. Surgical Indications, Timing, and Complications Patient Age (y) Sex Indications for Surgery Patients with fracture <20 mm distance from proximal fifth metatarsal 13 Male Failure to show signs of healing radiographically and clinically 11 Male Failure to show signs of healing radiographically and clinically 13 Male Symptomatic nonunion 15 Male Symptomatic nonunion 13 Male 12 Male 14 Female 14 Male 14 Male Failure to show signs of healing and further displacement after conservative measures Symptomatic nonunion Symptomatic nonunion Multiple refractures and failure of conservative management Refracture, failure to heal since most recent fracture Time from Injury to Surgery Procedure Complications 25 d, 3.5 wk ORIF None 33 d, 4.5 wk ORIF None 8 mo > 3 mo 24 d, 3.5 wk ORIF ORIF with tibial bone graft ORIF None Infection and excision of proximal fragment 3 mo later None > 6 mo ORIF 12 mo ORIF 2y ORIF Revision and excision or proximal fragment and reattachment of peroneous brevis Nonunion and screw migration, screw removed, and peroneous brevis reattached None >1 y since initial injury, 3 mo since most recent injury ORIF Elective screw removal ORIF ORIF None None ORIF ORIF ORIF ORIF Elective screw removal None None None Patients with fracture 20-40 mm distance from proximal fifth metatarsal 18 Male Symptomatic nonunion 5 mo 17 Female Failure to show signs of healing 5 wk radiographically and clinically 17 Male Symptomatic delayed union 8 wk 16 Male Symptomatic delayed union 8 wk 18 Male Acute fracture in a soccer player 1 wk 17 Male Refracture (twice) 1 y since original injury ORIF indicate open reduction and internal fixation. identifying the zone where healing is difficult is still crucial and often difficult in the clinical setting.4 Fractures of the proximal tuberosity will usually heal with conservative management, usually with weight-bearing in a cast or boot.2,3,9,11–20 However, the proximal metaphyseal-diaphyseal junction and proximal diaphysis remains the area of difficulty in treatment of fractures to this bone due to a watershed region of poor perfusion in this location,4,9 and this is true both in adults and adolescents.2,3 The difficulty is often differentiating between the fractures that are likely to heal uneventfully, and the “at-risk” fractures that may have delayed or difficult healing. Multiple descriptive classifications have been proposed,2,5,9 but none that is simple to remember and easy to use at the initial patient encounter. We found a simple ruler measurement predictive of surgery for fifth metatarsal fractures. Patients who had fractures between 0 and 20 mm of the proximal aspect of the fifth metatarsal ended up getting surgery 4.9% (9/ 184), whereas those 20 to 40 mm had surgery 19% (6/32) and those >40 mm had no surgery (0/22); this was significant (P < 0.01). This was even more apparent when TABLE 2. Classification by Herrera-Soto Including Treatment by Classification Herrera-Soto Classification I = apophyseal injury II = tubercle fracture with intra-articular extension III = Jones fractures IV = diaphysis V = head/neck Total Total No. Patients Patients (%) Patients Treated Nonsurgically Patients Treated Surgically 47 132 24 27 8 238 19.7 55.5 10.1 11.3 3.4 100 47 123 18 27 18 223 0 9 6 0 0 15 There was a statistically significant difference in Herrera-Soto classification for those treated surgically compared with nonsurgically (analysis of variance, P < 0.001), which was maintained even when just the Herrera-Soto II were compared with Herrera-Soto III fractures (Fisher exact test, P = 0.0109). 300 | www.pedorthopaedics.com Copyright r 2014 Wolters Kluwer Health, Inc. All rights reserved. J Pediatr Orthop Volume 35, Number 3, April/May 2015 FIGURE 3. Chart showing percentage of fractures needing surgery in 5-mm increments measured from the proximal tip of the fifth metatarsal. The percentage needing surgery is noted to increase between 20 and 40 mm. There were no cases where a fracture over 40 mm from the proximal tip of the fifth metatarsal was determined to need surgery. only patients over the age of 15 were included. We also found that fracture location based on an overall percentage of fracture length was also predictive of surgery, and while this data were visually “cleaner,” it was not statistically different. We found that distance measuring was simpler, particularly given that surgical treatment of this fracture is in the age of the mostly skeletally mature child. Certainly by identifying the watershed region of poor healing for fracture management in the skeletally immature patient the percentage of overall fracture length can be detected. This simple ruler or percentage measurement obviates the confusion about which fractures are “Jones” fractures, and even which bony landmarks are indicative of poorly healing fractures.4 Other authors have noted this similar watershed region as being problematic for healing, with an increase in rates of surgery and delayed healing.3–6 Dameron11 identified the 1.5-cm segment distal to the tuberosity as the region at greatest risk of poor outcome. Our at-risk region from 20 to 40 mm is consistent with the size of Dameron’s observation and appears to correlate with Smith et al’s21 investigation of the arterial watershed region of the fifth metatarsal. The difficulty is determining which fractures are in this zone and warrant increased concern. This simple ruler measurement can be performed easily and quickly on any digital imaging system as well as on plain radiographic images to determine if a particular patient’s fracture falls within this concerning zone. The purpose of our study is to improve the identification of the zone of the fifth metatarsal where fractures are at greatest risk for difficulty healing, and we found this zone to be 20 to 40 mm or 25% to 50% of overall metatarsal length when measured from the proximal tip of the fifth metatarsal. This is the zone which may develop delayed healing or nonunion so that physicians may more confidently and reliably provide informed expectations for management—be it conservatively or operative—at a patient’s initial visit.4,22 It is Copyright r 2014 Wolters Kluwer Health, Inc. All rights reserved. Surgery in Isolated Pediatric Fifth Metatarsal Fractures also interesting to note that the more proximal fractures, <20 mm from the proximal tip of the fifth metatarsal, occur in the younger adolescent, whereas the slightly more distal fractures, 20 to 40 mm from the proximal tip, occur in the older adolescent with mature bone. Our cohort of 238 patients is the largest single-series review of isolated fifth metatarsal fractures in pediatric patients, and among the largest overall, which we have found in the literature. However, we recognize several limitations. Our primary limitation is using surgery as an endpoint when it remains somewhat of a subjective choice by each surgeon and patient, particularly in a retrospective study. However, all of the patients except one had surgery after a reasonable trial of nonoperative treatment and went on to surgery after lack of timely clinical and radiographic healing was evident. One patient received primary surgery within the first 3 weeks of injury, which is often done to facilitate return to competitive athletics; this particular injury may have healed with nonoperative means. Even when this patient is removed from the analysis, however, the increased risk in failure of nonoperative management holds true for fractures of 20 to 40 mm from the proximal tip of the fifth metatarsal. All other patients underwent surgery for failure to show signs of healing in a timely manner with ongoing clinical symptoms. There were patients in this series with painless nonunions, particularly of the avulsion fracture type. This number is difficult to quantify because not all patients had radiographs through bony union, and many asymptomatic patients returned to sports and activities without a final radiograph; a few who did have a radiograph suggested a possible asymptomatic nonunion. Surgery was never done for an asymptomatic nonunion. Furthermore, management varied (eg, cast or boot, weight-bearing or not) in this large retrospective series with many orthopaedists treating these injuries and it is impossible to synthesize the treatment. Certainly, some patients may have continued to experience symptoms after being cleared for activity but gone elsewhere for subsequent management. Finally, as a pediatric referral-based hospital we may have seen more fractures that needed surgery than would be typical in the general population. There has been a relative paucity of data regarding pediatric metatarsal fractures. Owen et al13 determined the rate of general metatarsal fractures in children but offered no guidance for management. Singer et al23 reported on a consecutive series of 166 metatarsal fractures in 125 children and described their epidemiology and fracture demographics. They found that children who were 5 years old or less were more likely to sustain their injury inside the house than older children. They also found that this younger group was more likely to fracture the first metatarsal and the older than 5-year group was more likely to fracture the fifth metatarsal.23 Unfortunately, this did not help differentiate treatment needs. Herrera-Soto et al2 has the most complete discussion of pediatric fifth metatarsal fractures, including a classification system, and noted that outcomes are comparable with adults. They did not provide a picture or examples of their classification. Although little has been www.pedorthopaedics.com | 301 Mahan et al J Pediatr Orthop available in the literature about pediatric fifth metatarsal fractures, our experience has been fairly consistent with the adult literature. However, the difficulty often remains determining which fractures are the likely-to-heal proximal fractures, and which are the more-difficult-to-heal “Jones” fracture. This can lead to a confusing discussion with the patient, and often unrealistic expectations in the more difficult injury. In conclusion, we found that most isolated fractures of the fifth metatarsal in children and adolescents can be treated nonoperatively. In the absence of an open fracture or evidence of compartment syndrome, these injuries should be considered for closed management. However, we identified a watershed region of 20 to 40 mm from the proximal tip of the metatarsal that in the older adolescent (>15 y) may lead to difficult healing and surgical intervention. Although this region corresponds to 25% to 50% of the overall metatarsal length in the younger child, we found that in the younger adolescent the fractures in this region healed with nonoperative methods. More proximal fractures (<20 mm from tip of proximal metatarsal or <25% of overall metatarsal length) were more likely to heal with nonoperative methods, but when they went on to symptomatic nonunion, it was in the younger adolescent age group (age, 11 to 15 y), and surgery was fraught with complications. Measuring from the tip of the proximal fifth metatarsal to the fracture line is a simple way to assess whether an isolated fifth metatarsal fracture is in the “at-risk” watershed region for increased possibility of needing surgical fixation and this can help guide treatment and counsel patients. for non-surgical and surgical management. J Bone Joint Surg Am. 1984;66:209–214. Lehman RC, Torg JS, Pavlov H, et al. Fractures of the base of the fifth metatarsal distal to the tuberosity: a review. Foot Ankle. 1987;7: 245–252. Acker JH, Drez D. Nonoperative treatment of stress fractures of the proximal shaft of the fifth metatarsal (Jones’ fracture). Foot Ankle. 1986;7:152–155. 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Fractures of the base of the fifth metatarsal distal to the tuberosity. Classification and guidelines 302 | www.pedorthopaedics.com 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. Copyright r Volume 35, Number 3, April/May 2015 2014 Wolters Kluwer Health, Inc. All rights reserved.