[Leiomyomatosis of the anal canal]

The solitary occurrence of a leiomyoma in the anal channel is rarely observed. Still more infrequently is the multiple appearance of such tumours in the anal channel which is to be named leiomyomatosis. On the basis of an own observation concerning the appearance of a relapsing leiomyomatosis of the anal channel in a 66-year-old woman is reported, which hitherto has not yet been described in literature. The clinical and morphological problems of this disease are discussed.