Compartment syndrome caused by a traumatized vascular hamartoma

A case report is presented of a traumatized vascular hamartoma producing a forearm flexor compartment syndrome; such a case has not been reported previously. The role of minor trauma in this case was important. There is a need for a high degree of suspicion in order to make an early, accurate diagnosis. Delayed surgical decompression and resection of the pathologic muscle resulted in a dramatic improvement in sensibility and digital mobility.