Crossed Renal Ectopia without Fusion—An Unusual Cause of Acute Abdominal Pain: A Case Report

Abstract

Introduction. Crossed renal ectopia is a congenital anomaly which usually goes unnoticed as most cases are asymptomatic. The majority, 90% of these are fused. Case Presentation. We report an unusual presentation of a case of crossed renal ectopia without fusion. Our patient is a 16-year-old adolescent male, previously fit and healthy, who presented with acute onset of abdominal pain. The clinical suspicion was that of an abdominal aortic aneurysm. Computed tomography with intravenous contrast revealed nonfused crossed renal ectopia. Conclusion. Although renal ectopia is an uncommon cause of acute abdominal pain, there should be an index of clinical suspicion in previously healthy individuals presenting with acute abdominal pain.

A Case of Crossed Left Renal Ectopia Identified during Colostomy Reversal

“…The majority of cases of crossed renal ectopia are asymptomatic and go undiagnosed until incidentally identified on imaging, during surgical exploration for unrelated reasons, or on autopsy. The most common form of crossed renal ectopia is the fused form accounting for approximately 90% of cases, with the unfused type (as was the case in our patient) accounting for the remaining 10% of cases [2]. …”

“…The second most common variant is the S-shaped, which involves the uncrossed kidney in its usual position and the crossed kidney inferior to the normal kidney without renal fusion, as is described in this case. The L-shape involves transverse positioning of the crossed kidney, with the lower poles in contact and the disc kidney occurs when medial borders of the uncrossed and crossed kidneys are fused together [2–4]. This becomes significant when determining the course of the ureter of the ectopic kidney during dissection of abdominal and pelvic structures in the operating room.…”

A rare form of crossed nonfused renal ectopia, multicystic dysplasia: A case report

“…Crossed renal ectopia can be anatomically differentiated into four groups: A) Crossed renal ectopia with fused kidneys (the most common type -90%), B) Crossed renal ectopia without fusion (rare), C) solitary Crossed renal ectopia (very rare) and D) unfused bilateral Crossed renal ectopia (also very rare) [5]. The ectopic kidney is usually located below the orthotopic kidney and occurs more frequently in males.…”

“…In some reported cases the patient develops additional symptoms such as; infection, renal calculi or urinary obstruction [1]. Up to 30% of cases can be incidentally diagnosed [5]. Case report A 6 months-old male was referred to the Pediatric Urology Department for evaluation of a multicystic dysplastic left kidney.…”

Crossed Renal Ectopia without Fusion: An Uncommon Cause of Abdominal Mass

“…CRE can be anatomically differentiated into four groups: (1) CRE with fusion (the majority of cases, 90%); (2) CRE without fusion (uncommon); (3) solitary CRE (very rare); and (4) unfused bilateral CRE (also very rare) [ 1 – 3 ]. In the first two groups, the ectopic kidney is usually located below the orthotopic kidney.…”