Abdominal aortic aneurysm with horseshoe kidney

Horseshoe kidney is the most common form of congenital malformation of the kidney. The incidence rate in the normal population is 1: 400 to 1: 1000, and the male to female ratio is 2: 1. The two kidneys are usually fused together at the fourth lumbar spine at the anterior midline of the aorta, and the collection system and ureter are displaced forward and medial. The ureter passes in front of the fused isthmus. In addition, atypical renal artery blood is often supplied.