A 2-week-old northern fur seal female pup (Callorhinus ursinus) found dead in the Pribilof Islands had an irregular mass at the anterior pole of the right kidney. Histopathological examination revealed a fibrosarcoma.

This content is only available as a PDF.

Author notes

*

Present address: Pathology Department, U.S. Naval Medical Research Unit No. 2, Box 14, APO San Francisco 96263, USA.