Abstract
The pancake kidney (PK) is a rare type of renal anomaly in which both kidneys completely fuse without an isthmus. In the previous reports, PKs have double ureters and are located in the pelvic cavity. We encountered a rare case of PK with a single ureter, which is located in the left retroperitoneal space, in a 95-year-old female cadaver, which was detected during a dissection course. In our case, the major calyces joined to form a single renal pelvis, which continued as a single ureter. To the best of our knowledge, this is the first report on PK with a single ureter that is located not in the pelvic cavity but in the retroperitoneal space. The knowledge of such anomalous presentation is important to avoid any complications during retroperitoneal surgery.
Similar content being viewed by others
References
da Silva RM, de Morais Júnior MF, Mont’Alverne Filho FE (2016) Pancake kidney with cysts and a single ureter. Radiol Bras 49:127–128
Ghawanmeh HM, Al-Ghzo M, Halalsheh OM, Al-Ghazo OM, Alshammari AK, Al-Karasneh AI, Al-Okour R (2017) Pancake kidney found inside abdominal cavity: rare case with literature review. Urol Case Rep 13:123–125
Glenn JF (1958) Fused pelvic kidney. J Urol 80:7–9
Goren E, Eidelman A (1987) Pelvic cake kidney drained by single ureter. Urology 30:492–493
Hiraoka M, Tsukahara H, Ohshima Y, Kasuga K, Ishihara Y, Mayumi M (2002) Renal aplasia is the predominant cause of congenital solitary kidneys. Kidney Int 61:1840–1844
Kanchan T, Murlimanju BV, Saralaya VV (2017) Pancake kidney with a single ureter: a rare incidental observation at autopsy. Anat Sci Int 92:142–146
Natsis K, Piagkou M, Skotsimara A, Protogerou V, Tsitouridis I, Skandalakis P (2014) Horseshoe kidney: a review of anatomy and pathology. Surg Radiol Anat 36:517–526
Park MJ (2016) Embryology of the genitourinary tract. In: Wein JA, Kavoussi RL, Partin WA, Peters AC (eds) Campbell-Walsh urology, 11th edn. Elsevier, Philadelphia, pp 2823–2848
Rinat C, Farkas A, Frishberg Y (2001) Familial inheritance of crossed fused renal ectopia. Pediatr Nephrol 16:269–270
Shapiro E, Goldfarb DA, Ritchey ML (2003) The congenital and acquired solitary kidney. Rev Urol 5:2–8
Tiwari AK, Choudhary AK, Khowal H, Chaudhary P, Arora MP (2014) Pancake kidney: a rare developmental anomaly. Can Urol Assoc J 8:451–452
Türkvatan A, Olçer T, Cumhur T (2009) Multidetector CT urography of renal fusion anomalies. Diagn Interv Radiol 15:127–134
Acknowledgements
The authors wish to thank Mr. Kazuto Arimura, Mr. Junji Goto, Ms. Kaori Hasegawa, and Ms. Yoshiko Kunita for their excellent secretarial and technical assistance.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors declare that they have no conflict of interest.
Ethical approval and consent to participate
In this study, we examined a cadaver donated for medical research according to Japanese law (Act No. 56 of 1983). We require the consent for donation from the donor and their family during their life. Following the guidelines of the Japanese Association of Anatomists (item 4. 5), a rare case encountered during a routine dissection class does not need to obtain a statement on ethics approval.
Rights and permissions
About this article
Cite this article
Horai, K., Naito, M., Yakura, T. et al. A case of pancake kidney with a single ureter in the retroperitoneal space. Anat Sci Int 93, 563–565 (2018). https://doi.org/10.1007/s12565-018-0442-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12565-018-0442-1