A rarely diagnosed case of urachal abscessation without any signs of inflammation of the extra-abdominal navel in a seven-month-old Braunvieh heifer is described. The symptoms of this disease, its diagnosis by the means of ultrasonographic examination and its therapy are explained. The technique of ultrasonographic examination is supposed to be a facilitation of presurgical diagnosis of umbilical disease. Nevertheless the value of this diagnostic procedure should be checked up on more patients.