CYTOKERATIN PROFILES OF CANINE ANAL SAC AND HEPATOID GLAND NEOPLASMS

Ten adenocarcinomas of the apocrine gland of the anal sac and 11 hepatoid gland neoplasms were studied to determine the coordinate expression of cytokeratin 7 (CK7) and cytokeratin 14 (CK14) using commercially available antibodies. Hepatoid gland neoplasms included hepatoid gland adenomas, carcinomas and a single epithelioma. All 10 (100%) adenocarcinomas of the apocrine gland of the anal sac had CK7[Formula: see text]/CK14[Formula: see text] immunophenotype, whereas all 11 (100%) of hepatoid neoplasms expressed CK7[Formula: see text]/CK14[Formula: see text] immunophenotype. Hepatoid gland adenomas, carcinomas, and epithelioma could not be differentiated based on the cytokeratin immunophenotype. Hepatoid gland neoplasms could be differentiated from adenocarcinomas of the apocrine gland of the anal sac by differences in the CK7/CK14 immunophenotypes with a [Formula: see text]-[Formula: see text]. The results of this study provide further support for the use of coordinate expression of CK7/CK14 to differentiate apocrine gland adenocarcinomas of the anal sac (CK7[Formula: see text]/CK14[Formula: see text]) from hepatoid gland neoplasms (CK7[Formula: see text]/CK14[Formula: see text]).