1. Complete discoid external fibrocartilage of the knee joint is a rare congenital anomaly.
2. The condition is of clinical importance because it may produce symptoms which must be differentiated from other internal derangements of the knee joint.
3. Three cases are presented, with a consideration of the anatomical development, the diagnosis, and the surgical treatment of the anomaly.
(C) 1934 All Rights Reserved.The Journal of Bone and Joint Surgery, Inc.