Ganglion cysts of the posterior cruciate ligament.

Ganglion cysts arising from the posterior cruciate ligament (PCL) of the knee are rare. Thirteen cases have been reported with detailed description in the English literature. In this study, 3 cases of ganglion cyst arising from the PCL of the knee are described and comparatively reviewed with the literature. This case report draws attention to clinical symptoms and signs. We presume that rather than mechanical block, it is changes in the shape and dimension of the ganglion cyst with knee motion and posture that stimulate nerve endings in the synovial membrane, causing the development of knee pain and the limitation of knee motion.