Open Veterinary Journal

Open Veterinary Journal

Peer-Reviewed Journal 
ISSN 2218-6050 (Online), ISSN 2226-4485 (Print) 

"Case Report"

Bladder teratoma in a maned wolf (Chrysocyon brachyurus)

Lana Fox1*, Christopher S. Hanley2, Luis R. Padilla2 and Mary Duncan2

1- Texas A&M Veterinary Medical Teaching Hospital, Department of Zoological Medicine, 408 Raymond Stotzer Parkway, College Station, TX 77845, USA

2- Department of Animal Health, Saint Louis Zoo, One Government Drive, Saint Louis, MO 63110, USA


Background: Teratomas are germ cell tumors, comprised of a mixture of tissue types and with tissue foreign to their site of origin.

Case Description: A 5.5-year-old intact female maned wolf (Chrysocyon brachyurus) was treated for recurrent stranguria and suspected cystitis. Due to lack of resolution, the wolf was anesthetized for further evaluation. The urinary bladder was firm on palpation, with a markedly thickened wall and no observable lumen on ultrasound. Neoplastic infiltration was suspected on double contrast cystogram and confirmed via surgical exploration. The lesion was inoperable and the wolf was euthanized. Gross necropsy revealed two poorly distinguished masses infiltrating the urinary bladder dorsally and caudoventrally, with minimal remaining lumen. Histopathologic examination of the bladder and associated masses revealed a neoplasm comprised of multiple tissue types. Vascular invasion was noted.

Conclusion: The neoplasm was diagnosed as an extragonadal teratoma. Few extragonadal teratomas have been described and this is the first report of a teratoma originating in the urinary bladder of a non-human species.

Keywords: Bladder neoplasia, Chrysocyon brachyurus, Maned wolf, Stranguria, Teratoma.

Cite this paper:

Fox, L., Hanley, C.S., Padilla, L.R. and Duncan, M. 2019. Bladder teratoma in a maned wolf (Chrysocyon brachyurus). Open Vet. J. 9(3), 259-262.