• Severe deformity has sometimes resulted from fractures through the radial condyle of the humerus. There has been controversy as to treatment, especially as to the need for open reduction.
It is necessary to distinguish between two types. If the fracture line passes lateral to the trochlear groove, the fracture is classified as type 1; in the absence of displacement, closed reduction may be attempted. But if the fracture line lies in or medial to the trochlear groove, displacement of the ulna results. This fracture, classified as type 2, requires open reduction to correct the ulnar dislocation.
Swelling and hemorrhage make it difficult to distinguish between the two types clinically, but roentgenographically the difference is unmistakable. The differential diagnosis is essential, because failure in fractures of type 2 results in disability.
Milch H. FRACTURES OF THE EXTERNAL HUMERAL CONDYLE. JAMA. 1956;160(8):641–646. doi:10.1001/jama.1956.02960430031006
Customize your JAMA Network experience by selecting one or more topics from the list below.
Create a personal account or sign in to: