Excision of a ganglion cyst from within the posterior septum of the knee--an arthroscopic technique.

Ganglion formation within the posterior septum of the knee has not been reported in the literature. The anatomy of the posterior septum makes it inaccessible to routine arthroscopic examination because it is formed by the reflections of the synovium from the posterior cruciate ligament. We describe a technique whereby a ganglion within the posterior septum of the knee was excised successfully.