title: Retroperitoneal pulmonary choristoma in a newborn calf.
abstract: A newborn male Romagnola calf, who had died a few hours after birth, was submitted for postmortem examination. Necropsy revealed a 23 cm × 22 cm × 5 cm, pale pink, lobulated, elastic, partially fluctuant mass that protruded from the dorsal retroperitoneal space into the abdominal cavity, extending from the diaphragm to the left kidney. The mass consisted of mature pulmonary tissue and was consistent with a pulmonary choristoma. The gross and microscopic appearance of this rare tumor-like congenital lesion and the possible pathogenesis are discussed.
authors.affiliation: Department of Veterinary Public Health and Animal Pathology, Faculty of Veterinary Medicine, Alma Mater Studiorum-University of Bologna, via Tolara di Sopra 50, Ozzano Emilia (Bologna) 40064, Italy. patrizia.bassi3@unibo.it
authors.forename: Patrizia
authors.initials: P
authors.lastname: Bassi
authors.forename: Arcangelo
authors.initials: A
authors.lastname: Gentile
authors.forename: Gianfranco
authors.initials: G
authors.lastname: Militerno
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D002417:Cattle; D002418:Cattle Diseases / Q000151:congenital* / Q000473:pathology; D002828:Choristoma / Q000151:congenital / Q000473:pathology / Q000662:veterinary*; D008168:Lung; D008297:Male; D012187:Retroperitoneal Space