Accessory ossicles in the elbow.

Accessory ossicles in the elbow are often diagnosed as osteochondritis dissecans or chondromatosis, but no terminologic agreements seem to exist in the literature. Our study of 5 patients suggests that accessory ossicles in the fossa olecrani or coronoidea may represent anatomic variants, perhaps best described as os supratrochleare anterius and posterius, respectively.