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Query: UMLS:C0476089 (endometrial cancer)
 11,379 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Uterine serous carcinoma is a uncommon aggressive variant of endometrial cancer whose biologic origin is unclear. Mutations in p53 and BRCA1 genes play a key role in ovarian serous carcinogenesis. We investigated whether the loss of BRCA1 expression plays a similar role in uterine serous carcinoma. Loss of BRCA1 expression and Wilms tumor 1 (WT-1) overexpression were detected by immunohistochemical analysis. Depth of myometrial invasion, the presence of precursor lesions or polyps, and clinical parameters (age, history of breast cancer, and germline BRCA1 mutation status) were recorded. A total of 27 cases were available for evaluation. Three tumors (11.1%, 95% confidence interval, 2%-29%) showed the loss of BRCA1 expression. Two of these had known germline mutation in BRCA1, and the third had not been analyzed. Two of these cases expressed WT-1 or showed some morphologic features suggestive of drop metastasis from the adnexa, but no case showed detectable serous tubal intraepithelial carcinoma or features of an ovarian primary tumor. Overall, 5 women in the group had a personal history of breast cancer, and the finding was significantly associated with BRCA1 staining (P=0.049). A subset of uterine serous carcinomas shows the loss of BRCA1 protein and is associated with germline mutation.
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PMID:Immunohistochemical loss of BRCA1 protein in uterine serous carcinoma. 2468 40

Metaplastic papillary tumor (MPT) of the fallopian tube is a very uncommon lesion, displaying papillary growth of bland-appearing cells with abundant, eosinophilic cytoplasm and mucinous metaplasia. It is difficult for pathologists to determine whether to categorize this lesion as a metaplastic proliferative lesion or a true neoplasm. We recently experienced a case of tubal MPT and initiated a comprehensive review of previously published cases with thorough analysis of clinicopathological characteristics. MPT is typically related to pregnancy, but we describe the first case of pregnancy-unrelated, incidentally detected tubal MPT in a 51-year-old woman who underwent surgery for endometrial cancer. The MPT consisted of small papillary formations with epithelium consisting of nonciliated, columnar cells with abundant eosinophilic cytoplasm arranged as either a single layer or pseudostratified layer. The stroma had a myxoid appearance. Intraluminal and extracellular mucin and floating papillary tufts were observed. Nuclei of the epithelial lining cells were centrally located, rounded or oval, and displayed intranuclear pseudoinclusions or grooves. The MPT cells were positive for paired box 8, epithelial membrane antigen, and cytokeratin. Interestingly, Wilms tumor 1 (WT1) protein was localized within the cytoplasm of MPT cells. Furthermore, the MPT cells did not express phosphatase and tensin homolog deleted on chromosome 10 (PTEN). In summary, MPT of the fallopian tube is a very unusual, distinctive entity displaying unique histopathological features and immunophenotype. Our observation of cytoplasmic WT1 expression and loss of PTEN expression in tubal MPT suggests its neoplastic nature and raises the possibility of WT1 or PTEN involvement in the development of MPT.
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PMID:Clinicopathological Characteristics of Metaplastic Papillary Tumor of the Fallopian Tube. 2866 62