Avian ocular neoplasia--a description of spontaneously occurring cases.

Twenty-one cases of ocular neoplasia were studied in birds submitted for diagnosis. Eighteen of these were lymphocytic tumors in chickens affecting various parts of the globe and retrobulbar tissues. Two cases of rhabdomyosarcoma in chickens were recorded. One of these was located in the anterior uvea and the other in the orbit. One adenocarcinoma was seen in a budgerigar.