Colonic adenocarcinoma in a corn snake (Elaphe guttata guttata).

Colonic adenocarcinoma was diagnosed by surgical biopsy in a domestically raised 3-yr-old male corn snake (Elaphe guttata guttata). The snake presented with a history of constipation. Several masses were palpated in the distal coelomic cavity. On proctoscopy, a nodular firm white mass encircled the distal colon proximal to the cloaca. The histologic diagnosis was transmural mucinous colonic adenocarcinoma with scirrhous reaction. Resection of the affected region alleviated intestinal obstruction for at least 4 mo, after which the snake was lost to follow-up.