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Peer-reviewed veterinary case report

Kitten with swollen kidney from birth ureter narrowing

By Ioannidi, Olympia M et al.·Published in Topics in companion animal medicine·2019·Faculty of Health Sciences·View original on PubMed

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Original publication title: Congenital Unilateral Ureteral Stenosis With Hydronephrosis in a Kitten.

Species:
cat

Plain-English summary

A 4-month-old male domestic longhair cat was brought in because he had been experiencing a swollen belly for two months. During the exam, the vet noticed he was having some trouble breathing and felt a large mass in his abdomen. An ultrasound showed that his right kidney was swollen due to a condition called hydronephrosis, which was caused by a blockage in the ureter (the tube that carries urine from the kidney). The vet performed surgery to remove the affected kidney, and after the procedure, the kitten recovered well. Eight months later, he was doing great and had no further issues.

People also search for: kitten swollen belly · cat hydronephrosis treatment · congenital ureteral stenosis in cats

Abstract

A 4-month-old, intact male, domestic longhair cat was admitted with a 2-month history of abdominal distention. Physical examination revealed a mild inspiratory distress and a large palpable intraabdominal mass, in an otherwise bright and alert cat. Abdominal ultrasonography revealed a large hypoechoic cystic structure compatible with hydronephrosis or a renal cyst. On exploratory celiotomy, hydronephrosis of the right kidney was documented and ureteronephrectomy was performed. Histopathology of the excised tissues revealed severe stenosis in the proximal ureteral lumen without evidence of obstructive material, a normal ureteral epithelium and severe atrophy of the renal cortex and medulla, supporting the diagnosis of congenital unilateral ureteral stenosis. The cat recovered uneventfully and 8 months later was in excellent clinical condition. Congenital ureteral stenosis with secondary hydronephrosis may occur rarely in cats and should be included in the differential diagnosis of progressive abdominal distention in young cats.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/31472725/