case_images: PMC5961133_01
case_images: A chick pea- size ulcerated tumor mass almost occluding the entrance of the left ear canal.
case_images: OpenVetJ-8-168-g001.jpg
case_images: PMC5961133_01_OpenVetJ-8-168-g001.jpg
case_images: F1
case_images: Bean-sized hard ulcerated masses were removed surgically under general anesthesia and were processed for light microscopic examination (Fig. 1).
case_images: Distended ductules with their lumen largely occupied by proliferating neoplastic epithelium. These ductules were separated by interrupted layers of myo- epithelium. Inset: epithelial intracytoplasmic cerumen pigment-containin.
case_images: OpenVetJ-8-168-g002.jpg
case_images: PMC5961133_01_OpenVetJ-8-168-g002.jpg
case_images: F2
case_images: Most of those ductules were completely obliterated by the proliferating neoplastic epithelial cells (Fig. 2) but others displayed sieve-like cribriform or comedo patterns when centrilobular core of epithelial necrosis existed (Fig. 3&4).
case_images: Invasion of neoplastic epithelial cells in the stroma. These cells are Pleomorphic and hyperchromatic and displayed poor acinar arrangement (H&E , x10).
case_images: OpenVetJ-8-168-g005.jpg
case_images: PMC5961133_01_OpenVetJ-8-168-g005.jpg
case_images: F5
case_images: Criteria of carcinogenesis were most evident on glandular epithelial cells which invaded the stroma and the lymphatics (Fig. 5&6).
case_images: Adenomatous irregularly dilated glandular acini containing sloughed folded and fragmented epithelium (H&E, x10).
case_images: OpenVetJ-8-168-g007.jpg
case_images: PMC5961133_01_OpenVetJ-8-168-g007.jpg
case_images: F7
case_images: They were irregularly dilated with folded hyperplastic epithelium (Fig. 7).