Category: Clinical Stones: Ureteroscopy

MP29-7 - Lower Pole Anatomy of Horseshoe Kidneys and Kidneys ith Duplex Collecting Systems: Study Applied to Endourology

Sun, Sep 23
2:00 PM - 4:00 PM

Introduction & Objective :

The success rate of treatment for calculi located in the lower pole of the kidney, regardless of the method used, is directly related to the anatomical parameters. It is consensus that spatial anatomy of the lower pole is of utmost importance during endourological procedures in patients with kidney anomalies. We aimed to analyze the three-dimensional intra-renal anatomy of Horseshoe Kidneys and kidneys with Duplex Collecting Systems, comparing with normal kidneys.

Methods :

We analyzed 17 three-dimensional polyester resin endocasts of the kidney collecting system. Among that, 3 were horseshoe kidneys, 4 had duplex collecting systems and 10 kidneys presented no macroscopic anomalies. We studied the number of calyces, width and length of the infundibulum and the minor calyces and the angles (between the lower infundibulum and renal pelvis - LIP and between the lower infundibulum and the lower minor calyces - LIMC). The data were analyzed by ANOVA and the unpaired T-test (p

Results :

There was a statistically significant difference in the length of the major calyces (p = 0.0002) and the minor calyces (p = 0.0001) in the control group when compared to the Duplex Collecting Systems group. There was a statistically significant difference in the number of major calyces (p = 0.0001) and the number of minor calyces (p = 0.0149) in the Duplex Collecting Systems group, when compared to the Horseshoe Kidneys group and to Control group. There was no statistical difference in the width of the major calyces (p = 0.2278), the width of the minor calyces (p = 0.1619), the LIP (p = 0.3003) and the LIMC (p = 0.3889) in the groups analyzed.

Conclusions :

We did not observe significant differences in the anatomy of Horseshoe Kidneys regarding lower pole measurements, when compared to controls. We observed that Duplex Collecting Systems had more restrictive anatomical factors in the lower pole than Horseshoe Kidneys. 

Ulisses G. Sobrinho

State University of Rio de Janeiro
Rio de Janeiro, Rio de Janeiro, Brazil

Luciano A. Favorito

Full Professor
State University of Rio de Janeiro
Rio de Janeiro, Rio de Janeiro, Brazil

Francisco J. Sampaio

Full Professor and Head
State University of Rio de Janeiro
Rio de Janeiro, Rio de Janeiro, Brazil

Anatomist and Urologist
Full-Professor, Biomedical Center, State University of Rio de Janeiro
Director of the Urogenital Research Unit
Senior Investigator (I-A), National Council of Research (CNPq), Ministry of Science and Technology
Scientist of State of Rio de Janeiro (Foundation for Research Support - RJ)
Other positions:
General Coordinator, All National Programs of Postgraduation in Surgery and Surgical Specialties - Government Postgraduation Agency (CAPES), Ministry of Education, 2005 - 2010
Full-Member, National Academy of Medicine, Brazil, Past President 2015-2017