A 17-year-old boy presented to the emergency department with pain in his left wrist. The onset of symptoms occurred while at bat in the second game of a four-game tournament in which he was playing that day. The pain impaired his ability to bat through the remaining games. He complained of mild tingling in his small finger. He was right handed. Exam showed mild point tenderness in the proximal hypothenar region of his left hand. He had normal wrist and finger range of motion and normal finger neurovascular function. A radiograph of the wrist was interpreted by the emergency physician (and later by the radiologist) as normal. A CAT scan of the wrist was ordered.
What do the tests show?
Conclusion on next page