“…A Primary squamous cell carcinoma (SCC) of the ovary is rare, and only few cases have been reported. As to the histogenesis of this tumor, malignant transformations of a mature cystic teratoma (Kionsky et al 1972;Sivanesaratnam and Lee, 1972;Kaplan, 1977;Gabrielli et al 1984;Tang et al 1984;Hirakawa et al 1989), Brenner tumor (Idelson, 1963Miles and Norris, 1972;Seldenrijk et al 1986;Tang and Kang, 1990) or endometriosis (McCullough et al 1946;Lele et al 1978;Chen and Weilert, 1982;Tetu et al 1987;Naresh et al 1991) have been considered. The most common origin of this tumor is either mature cystic ter-atoma or Brenner tumor.…”