An unusual insertion of an accessory band of the semitendinosus tendon: case report and review of the literature.

The Pes Anserinus is characterised by high morphological variability. It consists of three tendons: the sartorius, gracilis and semitendinosus. The semitendinosus and gracilis tendons are routinely harvested for reconstruction anterior cruciate ligament, and the presence of accessory bands within them can handicap the harvesting process. This report presents a case of a rare insertion of accessory band of the semitendinosus tendon (to the fascia of the soleus muscle and tibia). The current classification should be extended to accommodate such "rare cases" to facilitate more successful hamstring grafts.