Abstract
Scaphoid fractures are rare injuries in the pediatric population. A clinical and radiographic review over a six-year period at our institution revealed ninety-nine suspected scaphoid fractures. All of these patients presented with post-traumatic tenderness in the anatomic snuffbox and were treated with thumb spica cast immobilization. Only 9% of these patients demonstrated radiographic evidence of scaphoid fracture on initial presentation. At subsequent follow-up, six additional patients revealed radiographic evidence of scaphoid fracture. Positive predictive value of snuffbox tenderness for scaphoid fracture was 6% for patients with initially normal radiographs.
To review the clinical and radiographic results of suspected pediatric scaphoid fractures, as well as to determine the predictive value of anatomic snuffbox tenderness for occult fracture.
Pediatric scaphoid fractures are rare injuries that were found to be non-displaced and to involve the waist and distal scaphoid in most cases. Snuffbox tenderness had a positive predictive value of 6% in the identification of occult fracture.
In cases of suspected scaphoid fracture and normal radiographs, reliance on anatomic snuffbox tenderness alone will result in unnecessary immobilization in the majority of children.
Ninety-nine potential injuries were identified. Average age was 13.9 years. Although all patients in this group had tenderness in the snuffbox, only nine of the original x-rays revealed a true scaphoid fracture. The ninety “clinical scaphoid fractures” were immobilized for twenty-three days on average. Of these, only six demonstrated future radiographic evidence of fracture. No injuries required surgery for non-union.
All pediatric scaphoid fractures that were diagnosed clinically or radiographically at our institution between 1998 and 2003 were reviewed. Initial and follow-up radiographs were examined for evidence of fracture.
Given the sequelae of untreated scaphoid fractures in adults, tenderness in the snuffbox has been used to diagnose “clinical scaphoid fractures”. Although never validated in children, this test continues to be used in this population. As the natural history of scaphoid fracture in children is more favorable than in adults, reliance on snuffbox tenderness alone has resulted in the over-treatment of this injury.
Correspondence should be addressed to Cynthia Vezina, Communications Manager, COA, 4150-360 Ste. Catherine St. West, Westmount, QC H3Z 2Y5, Canada
