Example of an adenocarcinoma developed in the gastric lymph nodes of a harbor seal Phoca largha

Adenocarcinomatous growths comprising glandular cavities surrounded by cubo idal to low columnar cells and a large amount of mucus produced by the muco us cells, were observed in the the gastric lymph nodes of a harbor seal Pho ca largha. The seal was stranded on the coast of Toyama Bay, Sea of Japan, on 2 March, 1998. Necroscopic examination also showed the animal had signif icant signet ring cell carcinoma in the stomach, as has been reported elsew here. The adenocarcinoma may have developed from metastatic cells arising i n the gastric carcinoma.