Coronal-plane transcondylar fracture of the humerus in a child.

A coronal plane fracture of the distal humerus in a child is an uncommon fracture, with the most familiar example being a capitellar fracture. An unusual coronal fracture of the entire distal humeral articular surface (capitellum and trochlea) occurred in a three-year-old boy. This fracture pattern has been described in adults but is believed to be previously unreported in children. This Salter-Harris Type IV fracture was initially misdiagnosed as a lateral humeral condyle fracture. Three years after treatment with open reduction and pin fixation, the distal humerus shows no evidence of growth disturbance.