Abstract
A one-year-old, neutered male Scottish Fold cat was presented with possible ceruminous adenocarcinomas that had occurred simultaneously and symmetrically in both external ear canals. Macroscopically, there were a bleeding ulcerated papule that was black and 5 mm in diameter in the left ear canal, and two adjacent papules that were both dark red and black, and 3 mm both in diameter in the right ear. The locations of the papules were similar in both canals, and near the orifices of the canals. There was no finding consistent with otitis externa in either canal. The histopathology of the ceruminous glands of both canals revealed adenomatous and/or papillomatous proliferations in various degrees with significant atypias and infiltrations. Taking account of these findings, vertical ear ablations were performed bilaterally with adequate margins around tumors including normal skins and auricular cartilages.
