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  • Title: Clinical outcome of atypical endometrial hyperplasia diagnosed on an endometrial biopsy: institutional experience and review of literature.
    Author: Rakha E, Wong SC, Soomro I, Chaudry Z, Sharma A, Deen S, Chan S, Abu J, Nunns D, Williamson K, McGregor A, Hammond R, Brown L.
    Journal: Am J Surg Pathol; 2012 Nov; 36(11):1683-90. PubMed ID: 23073327.
    Abstract:
    The aims of this study were: (1) to review the rate of concurrent endometrial cancer in patients with a preoperative diagnosis of atypical endometrial hyperplasia (AEH); and (2) to determine the features of concurrent endometrial carcinoma and their impact on the subsequent management of AEH. We reviewed a retrospective series of 219 AEHs diagnosed locally in routine practice, over 24 years, and followed by a repeat biopsy or hysterectomy. Another series of 65 cases with a malignant diagnosis on preoperative sampling was included as a control group. Clinicopathologic parameters were obtained. In addition, published data on the risk of malignancy and features of malignant tumors after a diagnosis of AEH were collected and analyzed. This study reported on 2571 patients diagnosed in 31 published studies in addition to the current one. This showed a wide variation in the positive predictive value (PPV) of AEH in detecting endometrial cancer (6% to 63%) with an overall PPV of 37%. This variation is not only based on the differences among studies but also on the degree of atypia [mild/moderate (PPV 13%) or severe (PPV 50%)], the type of subsequent intervention (biopsy vs. hysterectomy), and more importantly the time period of diagnosis (around 20% in studies published before 1990s and up to 40% to 48% in recently published cases). Of the benign outcome cases, nearly 40% to 50% showed AEH with a potential risk of progressing to invasive carcinoma in 25% of cases. Malignant tumors after AEH diagnosis are associated with features of good prognosis with endometrioid morphology, lower grade, and early stage. Although the overall PPV of AEH is 37%, a figure of 40% to 48% is expected in the cases currently diagnosed in routine practice. Providing qualifying criteria for AEH will help identify its different associated risks and therefore should be included in routine pathology reports whenever possible. Unless there is a clinical contraindication, hysterectomy should be performed to treat concurrent carcinoma and to reduce the risk of subsequent carcinoma in nonmalignant cases with residual AEH.
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