title: Squamous cell carcinoma arising from an epidermoid cyst in the ovary of a rat treated with 7,12-dimethylbenz[a]anthracene.
abstract: Primary non-teratomatous ovarian squamous cell carcinomas are very rare. A case of rat ovarian squamous cell carcinoma has been found in which the tumor arose from a squamous element in the ovary. Squamous epithelial aggregates were found in the wall of a cyst and on serial section, the cyst was found to be unaccompanied by any teratomatous components and showed a thin squamous epithelial lining with keratinizing debris. On the basis of these findings, it was suggested that the squamous element was a rat ovarian epidermoid cyst from which a squamous cell carcinoma arose, presumably by a direct carcinogenic effect of 7,12-dimethylbenz[a]anthracene.
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene; D000818:Animals; D002294:Carcinoma, Squamous Cell / Q000139:chemically induced*; D004814:Epidermal Cyst / Q000150:complications / Q000662:veterinary*; D005260:Female; D009374:Neoplasms, Experimental / Q000139:chemically induced; D010051:Ovarian Neoplasms / Q000139:chemically induced / Q000150:complications / Q000662:veterinary*; D051381:Rats; D011919:Rats, Inbred Strains; D012376:Rodent Diseases / Q000473:pathology
chemical_list: D015127:9,10-Dimethyl-1,2-benzanthracene