title: Retroperitoneal perirenal pseudocyst in a Massese breed ram.
abstract: The macroscopic and microscopic features of a retroperitoneal perirenal pseudocyst in a 12-month-old ram without impairment of renal function are described. In humans and animals, uriniferous pseudocysts may be of traumatic origin, resulting from rupture of kidney, renal pelvis, or ureter, or congenital. Lymphatic pseudocysts may develop secondary to inflammatory obstruction of the hilar lymphatics after perinephritis or renal transplantation. In this case, histologic characteristics of the pseudocyst wall were suggestive of development from the parietal peritoneal layer encapsulating the kidney. This is the first case of retroperitoneal perirenal pseudocyst in a sheep.
authors.affiliation: Diagnostic and Histopathology Department, Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università 10, 35020 Legnaro (PD), Italy.
authors.forename: Franco
authors.initials: F
authors.lastname: Mutinelli
authors.forename: Marta
authors.initials: M
authors.lastname: Vascellari
authors.forename: Eliana
authors.initials: E
authors.lastname: Schiavon
mesh_terms: D000818:Animals; D003560:Cysts / Q000473:pathology / Q000662:veterinary*; D007668:Kidney; D008297:Male; D012187:Retroperitoneal Space / Q000473:pathology*; D012756:Sheep; D012757:Sheep Diseases / Q000473:pathology*