%0 Journal Article
%T Mixed germ cell tumor composed of a tridermic testicular teratoma and seminoma in a rooster
%A Jessica N. Walters
%A Lisa M. Crofton
%A Tanya LeRoith
%A Vincent J. Tavella
%J Journal of Veterinary Diagnostic Investigation
%@ 1943-4936
%D 2019
%R 10.1177/1040638719838001
%X A 5-y-old backyard Araucana¨CAmericana rooster was presented to the regional diagnostic laboratory with a history of progressive lethargy and respiratory signs. Autopsy revealed a single large mass of testicular origin in the coelomic cavity, causing compression of other organs. Histologically, the mass was 1 neoplasm with mixed components of 2 different germ cell tumors, namely a teratoma composed of elements of all 3 primordial germ cell lines (ectoderm, mesoderm, and endoderm), and a seminoma consisting of round or polygonal cells arranged in sheets supported by a scant fibrovascular stroma. Teratomas and seminomas are both considered to be uncommon neoplasms in poultry medicine. A testicular teratoma is composed of mature embryonic tissue derived from at least 2 of the 3 germinal layers. Seminomas and teratomas both arise from the germinal epithelium of seminiferous tubules and are classified as germ cell tumors. This neoplastic mass thus is a rare case of a mixed germ cell tumor
%K chickens
%K mixed germ cell tumor
%K seminoma
%K teratoma
%K testicular tumor
%U https://journals.sagepub.com/doi/full/10.1177/1040638719838001