title: Clinicopathologic study of endometrial dedifferentiated endometrioid adenocarcinoma: a case report.
abstract: In 2006, dedifferentiated endometrioid adenocarcinoma (undifferentiated carcinoma associated with low-grade endometrioid carcinoma) of the uterus was first proposed. Dedifferentiated endometrioid carcinoma is part of the spectrum of undifferentiated carcinoma of the endometrium which is a highly aggressive tumor even when the undifferentiated component represents only 20% of the entire neoplasm. Therefore, accurate diagnosis and appropriate classification of this neoplasm are important in patient management. Lack of the recognition may lead to misclassification of dedifferentiated endometrioid adenocarcinoma as a pure endometrioid adenocarcinoma which is less aggressive. Only 4 papers have appeared in the literature so far on the topic of dedifferentiated endometrioid carcinoma. We report herein a first case of endometrial dedifferentiated endometrioid carcinoma in a 51-year old woman in Chinese population. We performed immunoperoxidase studies for 12 markers. Among them, cytokeratins, keratin 7, keratin 18, EMA, estrogen receptor (ER), progesterone receptor (PR), and vimentin show significantly differential expression between differentiated and undifferentiated area.
authors.affiliation: Department of Pathology, Tianjin Central Hospital of Gynecology and Obstetrics, Tianjin, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Shen
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Yuquan
authors.initials: Y
authors.lastname: Shi
authors.forename: Jinsong
authors.initials: J
authors.lastname: Liu
authors.forename: Yixin
authors.initials: Y
authors.lastname: Liu
mesh_terms: D014408:Biomarkers, Tumor / Q000032:analysis*; D018269:Carcinoma, Endometrioid / Q000378:metabolism* / Q000473:pathology*; D002454:Cell Differentiation; D016889:Endometrial Neoplasms / Q000378:metabolism* / Q000473:pathology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008875:Middle Aged
chemical_list: D014408:Biomarkers, Tumor