title: Cutaneous clear cell adnexal carcinoma in a dog: special reference to cytokeratin expression.
abstract: A 5-year-old, male Bichon-Frise dog presented with a cutaneous mass in the basal region of the auricle. Histologically, the cutaneous neoplasm was comprised of lobules with solid cellular proliferation separated by thin fibrous septa. Neoplastic cells varied in size, with moderate to abundant amounts of PAS-positive cytoplasm, large nuclei and prominent nucleoli. Immunohistochemical examinations showed that tumor cells were positive for pan-cytokeratin (CK) (AE1/AE3 and CAM5.2), CK8 and CK18, but negative for pan-CK (KL1), CK7, CK14, CK16 and CK20. Double-labeled immunofluorescence testing indicated that neoplastic cells frequently co-expressed CK and vimentin, suggesting divergent differentiation of tumor cells. Based on these findings, the tumor was diagnosed as canine clear cell adnexal carcinoma.
authors: Research Institute of Biosciences, Azabu University, Kawasaki, Kanagawa, Japan.
authors: Kyohei
authors: K
authors: YASUNO
authors: Shoko
authors: S
authors: NISHIYAMA
authors: Fumio
authors: F
authors: SUETSUGU
authors: Kikumi
authors: K
authors: OGIHARA
authors: Hiroo
authors: H
authors: MADARAME
authors: Kinji
authors: K
authors: SHIROTA
mesh_terms: D000818:Animals; D002277:Carcinoma / Q000378:metabolism / Q000473:pathology / Q000662:veterinary*; D004283:Dog Diseases / Q000378:metabolism* / Q000473:pathology; D004285:Dogs; D015972:Gene Expression Regulation, Neoplastic; D007633:Keratins / Q000235:genetics / Q000378:metabolism*; D008297:Male; D012878:Skin Neoplasms / Q000378:metabolism / Q000473:pathology / Q000662:veterinary*
chemical_list: D007633:Keratins