Related Experiment Video
Updated: Aug 18, 2026

Point-of-Care Kidney and Genitourinary Ultrasound in Adults: Image Acquisition
Published on: June 21, 2024
Perirenal pyelocaliceal diverticulum in an infant cat
Saori Tsujimoto1, Ken Okuda, Hiroko Okuda
1Laboratory of Veterinary Pathology, Azabu University, 1-17-71 Fuchinobe, Sagamihara, Kanagawa 229-8501, Japan.
Abstract:
A 3-month-old female tortoise-shell cat showing azotemia died with a marked swollen abdomen. Necropsy revealed a huge perirenal cyst (8.5 x 6.0 x 4.5 cm) on the ventral aspect of the right kidney. The cyst was filled with the pellucid yellow fluid with a smell of urine. The lumen was connected with irregularly dilated renal pelvis by a narrow channel passing through the renal parenchyma. The cyst was lined by epithelial cells and its wall was consisted of collagen fibers and smooth muscle cells as that of the renal pelvis and ureter. Renal parenchyma adjacent to the channel showed interstitial infiltration of the lymphoid cells. The cyst was a diverticulum of the renal pelvis due to an impaired development.
Related Concept Videos
Imaging Studies V: Intravenous Urography and Retrograde Pyelography
Acute Pyelonephritis II: Diagnostic Studies and Management
Acute Pyelonephritis I: Introduction
Kidney Transplant II: Surgical Procedure
Imaging Studies VI: Voiding Cystourethrography and Cystography
Urinary Tract Calculi V: Nursing Management