Uncommon congenital anomalies of the aorta.

Two cases of atypical localization of an aortic coarctation are described. One patient was a hypertensive girl with a hypoplastic type of coarctation in the descending aorta. After insertion of a bypass graft the hypertension disappeared. The other patient was a hypertensive girl with a total aplasia of the distal abdominal aorta and a hypoplasia of a right renal artery. After right nephrectomy the blood pressure became normal. There were no symptoms or signs of ischemia of the legs. This is the second case, known in literature, with a total aplasia of the abdominal aorta. Some general considerations about atypical coarctations are made.