Crossed renal ectopia
Citation, DOI, disclosures and article data
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View Ayush Goel's current disclosuresAt the time the article was last revised David Bassett had no financial relationships to ineligible companies to disclose.
View David Bassett's current disclosures- Cross ectopia
- Cross renal ectopy
Crossed renal ectopia is said to be present when the kidney is seen in the opposite retroperitoneal space. It is more common for the left kidney to be ectopically located on the right side. More than 85% of these get fused resulting in crossed fused renal ectopia. Less than 15% cases are non-fused.
Clinical presentation
Crossed renal ectopia is usually asymptomatic and incidentally found on imaging workup. It is usually seen fixed to iliac crest, but below the level of L2.
Radiographic features
Ultrasound
Absent kidney in its respective renal fossa. On careful examination, it is seen on the opposite side in the lumbar or iliac region.
CT
Demonstrates the kidney in its ectopic location in the contralateral retroperitoneal space. The detail of the collecting system is beautifully illustrated with delayed phase imaging. This can be important in the planning of surgical procedures.
References
- 1. Nursal GN, Büyükdereli G. Unfused renal ectopia: a rare form of congenital renal anomaly. Ann Nucl Med. 2005;19 (6): 507-10. Pubmed citation
- 2. Pellicé i Vilalta C, Veicat i Porcar M. Crossed renal ectopia. Actas Urol Esp. 1999;23 (7): 640. Pubmed citation
- 3. WINRAM RG, WARD-McQUAID JN. Crossed renal ectopia without fusion. Can Med Assoc J. 1998;81: 481-3. Free text at pubmed - Pubmed citation
Incoming Links
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