title: Perirenal pyelocaliceal diverticulum in an infant cat.
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.
authors.affiliation: Laboratory of Veterinary Pathology, Azabu University, 1-17-71 Fuchinobe, Sagamihara, Kanagawa 229-8501, Japan.
authors.forename: Saori
authors.initials: S
authors.lastname: Tsujimoto
authors.forename: Ken
authors.initials: K
authors.lastname: Okuda
authors.forename: Hiroko
authors.initials: H
authors.lastname: Okuda
authors.forename: Yumi
authors.initials: Y
authors.lastname: Une
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Nomura
authors.forename: Kinji
authors.initials: K
authors.lastname: Shirota
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D002371:Cat Diseases / Q000473:pathology*; D002415:Cats; D004240:Diverticulum / Q000175:diagnosis / Q000662:veterinary*; D017809:Fatal Outcome; D007150:Immunohistochemistry / Q000662:veterinary; D007670:Kidney Calices / Q000002:abnormalities* / Q000473:pathology