During the gross anatomy course at Kurume University School of Medicine in 1995, an anomaly of the kidney was found in the cadaver of an 88-year-old Japanese male. The lower ends of both kidneys were fused and thus formed a horseshoe kidney. The fused region is called an isthmus, and the isthmus was located ventral to the abdominal aorta and inferior vena cava. In this subject, the isthmus cons...