Papillary cystic cholangio cellular carcinoma in a dog with metastasis in the bronchial lymph node

Papillary cystic cholangio cellular carcinoma encountered in a dog appeared as firm, white and nodular mass in general except for cystic dilatation in some areas. Bronchial lymph node was enlarged to the extent, that it was pressing and constricting the posterior trachea. Histopathologically, well differentiated glandular structures lined by the neoplastic columnar cells resembling normal biliary epithelium were noticed. The stromal reaction was marked. The metastasis in the bronchial lymph node resembled the primary hepatic lesion.