[Pathology of the urachus: diagnosis and therapy].

Urachal abnormalities may provoke especially urinary tract infections. They become symptomatically first of all in the childhood. The development of urachal carcinoma is particularly described in the adult. The features of diagnosis and treatment will be presented with clinical examples. The only possible treatment of those malformations is the operative removal of the urachal tissue. This is most important to prevent as well urinary tract infections as the malignant degeneration of the urachal malformations.