Enzootic ethmoid tumor in cattle in the State of Rio de Janeiro

Abstract

Ten cases of a tumor in cattle which arose at the ethmoid region were studied. These tumors occurred in the last seven years in the State of Rio de Janeiro. Eight of the ten cases were seen on one single farm. The neoplastic growth is identical with the "enzootic ethmoid tumor" described in Sweden, at the beginning of this century. The tumor had generally expansive growth, occupied the nasal cavities and penetrated the paranasal sinuses, and frequently caused eye protrusion. In three cases the lamina cribrosa was destroyed with consequent invasion of the cranial cavity by the tumor. The histological aspect varied in the ten cases, and even among the eight cases on the same farm. Two epidermoid carcinomas, four adenocarcinomas and four cases of carcinoma simplex were diagnosed.