Georgiadi Kyriaki, Balomenos Vasileios, Tsoucalas Gregory, Fiska Aliki
Department of Anatomy, Democritus University of Thrace, Alexandroupolis, GRC.
Department of Radiology and Interventional Radiology, University Hospital of Alexandroupolis, Alexandroupolis, GRC.
Cureus. 2022 Jul 24;14(7):e27191. doi: 10.7759/cureus.27191. eCollection 2022 Jul.
Supernumerary kidney (SNK) is a rare congenital anatomical variation usually detected incidentally via imaging. Although a random finding, it may present with hydronephrosis, calculi or malignancy. Both its vascularization and its drainage vary significantly, depending on its location and shape. Riedel's lobe is a normal, though rare, variant of liver anatomy presenting either as a downward projection of the inferior border of the right liver lobe or as a triangular pyramidoid projection to the right of the gallbladder. We present a case of a 71-year-old man who was initially admitted to the hospital for backache. Computed tomography (CT) imaging revealed the simultaneous occurrence of a left supernumerary kidney and Riedel's lobe. The SNK lay caudally to the normal kidney, it was supplied by a branch of the superior mesenteric artery and its drainage was supported by a bifid ureter. The Riedel's lobe represented the "tongue-like" variant without causing any symptoms to the patient. Both entities should be monitored carefully, as their presence may require surgical management should they raise a sequence of symptoms or, as in this case, modify the surgical plans in the context of other coexisting medical events.
额外肾（SNK）是一种罕见的先天性解剖变异，通常通过影像学检查偶然发现。尽管是偶然发现，但它可能表现为肾积水、结石或恶性肿瘤。其血管供应和引流情况因位置和形状而异。里德尔叶是肝脏解剖结构中一种正常但罕见的变异，表现为右肝叶下缘向下突出或胆囊右侧的三角锥体状突出。我们报告一例71岁男性患者，最初因背痛入院。计算机断层扫描（CT）成像显示左额外肾和里德尔叶同时存在。额外肾位于正常肾脏的尾侧，由肠系膜上动脉的一个分支供血，其引流由双输尿管支持。里德尔叶表现为“舌状”变异，未给患者带来任何症状。这两种情况都应仔细监测，因为如果它们引发一系列症状或像本例一样在其他并存的医疗事件背景下改变手术计划，可能需要手术治疗。
