[Communicating uteri; a rather uncommon but important malformation (author's transl)].

A rare genital double malformation is dealt with in short. Including the four cases, which are reported, the number of the known cases in the literature amounts to only 31. The characteristic feature of the malformation is a communication of embryological origin between two uterine cavities. Diagnostic difficulties and clinical peculiarities can arise. Very often the genital malformation is accompanied by unilateral agenesis of kidney and ureter. Some clinical symptoms cannot be recognized and treated without knowledge about the existence of communication uteri, but the knowledge that malformations of the urinary tract may coexist is not less important. Indeed, it may be crucial for the patient's destiny.