[Asymmetric uterine malformations with menstrual retention. Apropos of a malformation associating atresia of the cervical isthmus and a pseudo-unicornous uterus].

There is now more or less general agreement how to classify and how to work out the development of symmetrical malformations of the female genital tract. On the other hand, asymmetrical malformations, as well as abnormalities of the development of the cervix and the isthmus are only rarely written about in the literature. It has not yet been possible to draw up a system to display the physiopathology and the embryology of these malformations. We here report a rare case of atresia of the cervix and isthmus as well as a pseudo unicornous uterus. This case should take its place as a piece in the embryological puzzle helping to fill in the details which might one day solve this puzzle.