Department of Internal Medicine and Diagnostics, Faculty of Veterinary Medicine and Animal Sciences, Poznan University of Life Sciences, Wolynska 35, 60-637, Poznan, Poland.
Department of Animal Anatomy, Faculty of Veterinary Medicine and Animals Sciences, Poznan University of Life Sciences, Wojska Polskiego 71C, 60-625, Poznan, Poland.
BMC Vet Res. 2020 Aug 27;16(1):314. doi: 10.1186/s12917-020-02535-9.
The case report describes a rare congenital anomaly, crossed fused renal ectopia (CFRE), with coexistence of two other abnormalities - atypical portal vein and coccygeal vertebrae malformation in a domestic cat. The concomitance of those 3 congenital defects has not been described previously.
An 8-month-old female, domestic cat suffering from chronic diarrhea was referred to the diagnostic imaging unit. The patient showed no other clinical symptoms. An abdominal ultrasonographic examination was performed in order to evaluate the condition of abdominal organs, particularly the gastrointestinal tract. The ultrasound examination showed an ectopic duplex kidney at instead of kidneys in their typical location. Computed tomography (CT) with angiographic phase and excretory urography was requested to evaluate the condition of the kidneys and ureters. The final diagnosis was CFRE, atypical portal vein and coccygeal deformation in an asymptomatic cat with no changes in renal function and normal blood parameters.
Crossed fused renal ectopia is a rare congenital anomaly and is easily detectable by an abdominal ultrasonographic examination and CT, which allows more complete assessment of both anatomical relations and secretory function of the kidney. The occurrence of CFRE, abnormal portal vein and spinal malformation in a clinically healthy patient is the evidence that congenital malformations may simultaneously involve various, not directly related structures and systems, without significant influence on blood and urine parameters. Thus the most useful tool in the evaluation of the morphological and functional changes is the diagnostic imaging, especially contrast enhanced CT. Our results show that renal fusions should be considered in the differential diagnosis of caudal abdominal masses.
本病例报告描述了一种罕见的先天性异常，即交叉融合性异位肾（CFRE），同时还存在另外两种异常——非典型门静脉和尾骨椎畸形，这些异常均发生于一只家猫。此前尚未有描述过这 3 种先天性缺陷同时存在的情况。
一只 8 月龄雌性家猫因慢性腹泻被转诊至影像诊断部门。该猫除腹泻外无其他临床症状。进行了腹部超声检查以评估腹部器官，特别是胃肠道的情况。超声检查显示异位双肾盂，而非在其典型位置的双肾。为评估肾脏和输尿管的情况，请求进行 CT 增强扫描和排泄性尿路造影。最终诊断为 CFRE、非典型门静脉和尾骨畸形，无症状猫无肾功能和血液参数变化。
交叉融合性异位肾是一种罕见的先天性异常，腹部超声检查和 CT 很容易检测到，这允许对肾脏的解剖关系和分泌功能进行更全面的评估。在临床健康的患者中同时发生 CFRE、异常门静脉和脊柱畸形的情况表明，先天性畸形可能同时涉及多个不直接相关的结构和系统，而对血液和尿液参数无明显影响。因此，评估形态和功能变化最有用的工具是影像学诊断，特别是增强 CT。我们的结果表明，在鉴别诊断尾部腹部肿块时应考虑肾融合。
