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- W1968268802 abstract "Controversies are still seen in the histological differential diagnosis of hyperplasia and well-differentiated endometrial carcinoma. Prediction of endometrial cancer in patients with hyperplasia with atypia, with the available markers has not been reliable yet. Hence these patients require more attention in the clinical management. Endometrial hyperplasia is proliferation of endometrial glands resulting in a higher gland : stroma ratio. Cytological atypia, which may progress to or co-exist with endometrial cancer and other pathological changes, result from estrogen stimulation unopposed by progesterone. Biomarkers whose expression is altered in cases of endometrial hyperplasia or cancer such as progesterone receptor, insulin-like growth factor I, retinaldehyde dehydrogenase type II, and secreted frizzled-related protein 4, seem to be promising to use as early-stage tumor markers. Mutation of PTEN is present in 83% of endometrial adenocarcinoma cases, making it the most frequent early molecular genetic alteration in type 1 endometrial tumors, which are generally associated with hyperplasia. p53 gene mutation is not found in endometrial hyperplasia, but researchers have detected this mutation in 20% of cases of endometrial carcinoma and 90% of cases of serous endometrial tumors. Cyclooxygenase-2 is important in tumorogenic transformation of hyperplasia. Expression of cyclooxygenase-2 decreases apoptosis, increases angiogenesis, and is related to invasiveness. Cyclooxygenase-2 expression increases significantly in cases of well-differentiated endometrial adenocarcinoma. Prostaglandin E2 is known to regulate aromatase gene expression and is the product of cyclooxygenase-2. The data about aromatase inhibitors are promising; in breast cancer patients, treatment with tamoxifen induces uterine abnormalities as early as 3 months after the initiation of therapy. In contrast, these abnormalities are not seen in patients who receive aromatase inhibitors and switched therapy after tamoxifen withdrawal may reverse tamoxifen-associated endometrial thickening." @default.
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- W1968268802 date "2008-04-01" @default.
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- W1968268802 title "From endometrial hyperplasia to endometrial cancer: insight into the biology and possible medical preventive measures" @default.
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- W1968268802 doi "https://doi.org/10.1097/cej.0b013e32811080ce" @default.
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