非対称性融合腎の2例 - 分類に関する考察 -

Abstract

An asymmetric fused kidney is regarded as a rare disease. Definition and terminology of it are, however, understood with some confusion. In this paper we reported two cases of asymmetric fused kidney and proposed a synthetical classification off used kidney and renal ectopia. According to presence of fusion, presence of symmetry and run of ureters this classification divides fused kidney and renal ectopia into 5 types. They are (1)horseshoe kidney, (2)non-crossed renal ectopia with fusion, (3)crossed renal ectopia with fusion, (4)crossed renal ectopia without fusion and (5)non-crossed renal ectopia without fusion. And they may be supplemented by characteristic shape or position such as (S-shaped kidney) or (thoracic kidney). According to this classification Case 1 corresponded to non-crossed renal ectopia with fusion (L-shaped kidney) and Case 2 corresponded to crossed renal ectopia with fusion (lump kidney).