title: Bilateral testicular germ cell-sex cord-stromal tumor in a pekin duck (Anas platyrhynchos domesticus).
abstract: An intact male white pekin duck (Anas platyrhynchos domesticus) was presented for examination because of respiratory distress and 2- to 3-month history of lameness and lethargy. Results of radiography, ultrasonography, and cytologic examination revealed a large neoplastic mass in the coelom. The duck was euthanatized, and results of necropsy revealed 2 large, lobulated masses in the coelom and a small nodule on the liver. Histopathologic examination of the large masses revealed a collision pattern testicular tumor consisting of Sertoli, seminoma, and interstitial cell components. The hepatic nodule was a metastatic lesion consistent with a Sertoli cell testicular tumor. This is the first reported case of a mixed germ cell-sex cord-stromal tumor in a duck.
authors.affiliation: Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, 379 East Campus Drive, Columbia, MO 65211, USA.
authors.forename: Stacey
authors.initials: S
authors.lastname: Leach
authors.forename: J Jill
authors.initials: JJ
authors.lastname: Heatley
authors.forename: Roy Ransom
authors.initials: RR
authors.lastname: Pool
authors.forename: Kathy
authors.initials: K
authors.lastname: Spaulding
mesh_terms: D000818:Animals; D004372:Ducks; D017809:Fatal Outcome; D008113:Liver Neoplasms / Q000556:secondary / Q000662:veterinary; D008297:Male; D011201:Poultry Diseases / Q000175:diagnosis / Q000473:pathology*; D018239:Seminoma / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary; D012707:Sertoli Cell Tumor / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*; D018312:Sex Cord-Gonadal Stromal Tumors / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*; D013736:Testicular Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*