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Type A–like Retroviral Particles in a Metastatic Intestinal Adenocarcinoma in an Emerald Tree Boa (Corallus caninus)

Abstract

A metastatic intestinal papillary adenocarcinoma was diagnosed histologically in an emerald tree boa (Corallus caninus). Metastasis was detected in the liver, both kidneys, lung, and coelomic wall. Ultrastructural examination of the metastatic intestinal epithelial cells in the liver revealed the presence of a moderate number of viral particles that most closely resembled type A retroviral particles and were mainly associated with granular endoplasmic reticulum membranes. This case is the first description of type A–like retroviral particles in a neoplasm of a snake. The role of the virions in the etiology of the intestinal adenocarcinoma is uncertain. In addition, this is the first confirmed report of a metastatic intestinal adenocarcinoma in a snake.

Key words: Intestinal adenocarcinoma metastasis; retrovirus; snakes.

Request reprints from Dr. J. Orós, Department of Morphology, Veterinary Faculty, University of Las Palmas de Gran Canaria, Trasmontana s/n, 35416 Arucas, Las Palmas (Spain). E-mail: joros{at}dmor.ulpgc.es

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