Immunohistochemical profile of serous papillary cystadenofibroma of the fallopian tube: a clue of paramesonephritic origin.

Cystadenofibromas of the fallopian tube are rare tumors of the female genital tract. These tumors are usually asymptomatic and are found incidentally. The authors present an incidentally found fallopian serous cystadenofibroma in a 48-year-old woman with leiomyoma uteri. The topographic localization of the lesion, histopathologic findings of müllerian-type epithelium, immunophenotypic profile of vimentin-cytokeratin coexpression, and diffuse apical epithelial membrane antigen (EMA) immunoreactivity suggested that the tumor was an embryologic remnant originating from the müllerian duct.