BACKGROUND: Only two previous cases of villoglandular adenocarcinoma of the vulva, an entity morphologically similar to tumors found in the uterine cervix and colorectum, have been reported. This paper communicates the first complete immunohistochemical study in villoglandular adenocarcinoma in order to determine its phenotype and histogenesis. CASE: A 69-year-old woman had a 1.5-cm nodule in the right labium majus. Histologically, it corresponded to a minimally atypical, villoglandular adenocarcinoma with a small microinvasion. Immunohistochemically, it was positive to OC125, CEA, and OC19.9 and coexpressed cytokeratins 7 and 20. Chromogranin, nuclear estrogen, and progesterone receptors were negative. CONCLUSION: Phenotypic expression was more consistent with a papillary mucinous ovarian or cervical neoplasm than of a colonic one. Its behavior was similar to that of its morphologic counterpart in the cervix, since the patient had no recurrence 3 years after a wide local excision. Copyright 2001 Academic Press.
BACKGROUND: Only two previous cases of villoglandular adenocarcinoma of the vulva, an entity morphologically similar to tumors found in the uterine cervix and colorectum, have been reported. This paper communicates the first complete immunohistochemical study in villoglandular adenocarcinoma in order to determine its phenotype and histogenesis. CASE: A 69-year-old woman had a 1.5-cm nodule in the right labium majus. Histologically, it corresponded to a minimally atypical, villoglandular adenocarcinoma with a small microinvasion. Immunohistochemically, it was positive to OC125, CEA, and OC19.9 and coexpressed cytokeratins 7 and 20. Chromogranin, nuclear estrogen, and progesterone receptors were negative. CONCLUSION: Phenotypic expression was more consistent with a papillary mucinous ovarian or cervical neoplasm than of a colonic one. Its behavior was similar to that of its morphologic counterpart in the cervix, since the patient had no recurrence 3 years after a wide local excision. Copyright 2001 Academic Press.