MACROSCOPIC AND MICROSCOPIC CHARACTERIZATION OF A URINIFEROUS PERIRENAL PSEUDOCYST IN A DOMESTIC SHORT HAIR CAT

The macroscopic and microscopic features of a uriniferous perirenal ps eudocyst in a castrated male 12-year-old American Domestic Short Hair cat are characterized. The development in humans and animals of a peri renal pseudocyst due to the accumulation of urine, lymph, or blood is discussed. In the presented case, microscopic evidence suggests that t he pseudocyst developed following formation of a split in the kidney c apsule. Emphasis is placed on the development of uriniferous pseudocys ts and three proposed criteria for their development: trauma, abnormal openings that allow extravasation of urine, or urethral obstruction.