Isolated traumatic denervation of the extensor pollicis longus.

This report describes a case of isolated denervation of the extensor pollicis longus (EPL), which has not previously been reported. The patient was a healthy 13-year-old boy who sustained multiple lacerations to the left forearm secondary to a dog bite. No motor responses were evident in the EPL, but the remainder of the exam findings were normal. Electromyography confirmed complete isolated denervation of the EPL. This patient was managed nonoperatively and had no significant functional deficits at final follow-up.