[A bursa of the tendon of the flexor hallucis longus (author's transl)].

The author reports six cases in whom there was contrast filling of a bursa related to the tendon of the flexor hallucis longus during the course of an arthrogram. All patients had had joint symptoms for a prolonged period; in three patients there was osteochondritis dissecans. Possible mechanism for the development of the bursa is discussed. The hypothesis is proposed that the bursa results from increased pressure in the joint due to recurrent synovitis.