title: Lymphosarcoma in an infant northern fur seal (Callorhinus ursinus).
abstract: An infant northern fur seal (Callhorinus ursinus) died in a rookery on St. Paul Island, Pribilof Islands, Alaska. Grossly, slight enlargement of the mesenteric lymph nodes was seen. Microscopically, a lymphosarcoma composed of sheets of monomorphic lymphoid cells in sections of lymph node and tonsil was seen. Electron microscopy of formalin-fixed tissues revealed several structures that were possible of viral origin in the cytoplasm of the neoplastic cells.
mesh_terms: D000818:Animals; D010872:Caniformia; D005260:Female; D046069:Fur Seals; D008198:Lymph Nodes / Q000473:pathology; D008228:Lymphoma, Non-Hodgkin / Q000473:pathology / Q000662:veterinary*