title: Diagnosis of occult scaphoid fractures: a randomized, controlled trial comparing bone scans to radiographs for diagnosis.
abstract: BACKGROUND
  Many patients with suspected scaphoid fractures but negative radiographs are immobilized for ≥ 2 weeks and are eventually found to have no fracture. Bone scans are reportedly 99% sensitive for these injuries if done ≥ 72 hours postinjury.
  
  
  OBJECTIVE
  The purpose of this study was to determine if early bone scans would allow for shorter cast immobilization periods in patients with suspected scaphoid fractures.
  
  
  METHODS
  Twenty-seven patients with clinically suspected scaphoid fractures and negative radiographs were randomized to early diagnosis (bone scan within 3-5 days; n  =  12) or traditional diagnosis (radiographs 10-14 days postinjury; n  =  15). The primary outcome was number of days immobilized in a cast.
  
  
  RESULTS
  The mean number of days immobilized was 26 in the traditional group and 29 in the bone scan group. Overall, 6 patients had scaphoid fractures (2 in the traditional diagnosis group and 4 in the bone scan group; p > 0.05), and 8 had other types of fractures. These other types of fractures included four distal radius fractures, two triquetral fractures, one trapezoid fracture, and one hamate fracture. There was no significant difference in the number of other types of fractures between groups. The Kaplan-Meier survival analysis using the log-rank test revealed that there was no statistically significant difference between days immobilized between the radiograph and bone scan groups (p  =  0.38).
  
  
  CONCLUSIONS
  The current study suggests that the use of bone scans to help diagnose occult scaphoid fractures does not reduce the number of days immobilized and that the differential diagnosis of occult scaphoid fractures should remain broad because other injuries are common.
authors: Christina
authors: C
authors: Hiscox
authors: Jeremy
authors: J
authors: LaMothe
authors: Neil
authors: N
authors: White
authors: Mark
authors: M
authors: Bromley
authors: Elizabeth
authors: E
authors: Oddone Paolucci
authors: Kevin
authors: K
authors: Hildebrand
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003937:Diagnosis, Differential; D004636:Emergency Service, Hospital; D005260:Female; D005500:Follow-Up Studies; D005596:Fractures, Closed / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D021361:Scaphoid Bone / Q000000981:diagnostic imaging / Q000293:injuries* / Q000473:pathology; D014954:Wrist Injuries / Q000175:diagnosis*; D055815:Young Adult