後大動静脈に位置し結石を合併した右尿管欠損の非対称性馬蹄鉄腎の1例

A case of the asymmetric horseshoe kidney was presented. A 38-year-old man was admitted with chief complaint of fever on 30th, September, 1974. Several urological studies, including IVP, PRP, angiography, renal scintigram and renogram, disclosed a findings interpreted as a reversed L-shaped asymmetric fused kidney and a right ureteral orifice could not be recognized in cystoscopic examination. Heminephrectomy was performed and the right renal mass was removed on 28th, January, 1975. The isthmus was confirmed to be located behind the caval vein and abdominal aorta and the right ureter could not be found. A post-operative course was uneventful and he was discharged from all the complications. We believe that this case comes within the category of asymmetric horseshoe kidney by the clinical and surgical findings. Nowaday, the reports of the symmetric horseshoe kidney are not so rare, but the asymmetric horseshoe kidney has been reported rarely. We can collect 12 cases of the asymmetric horseshoe kidney in Japanese literature up to date.