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  • Title: Risk Factors for Unsuccessful Office-Based Endometrial Biopsy: A Comparative Study of Office-Based Endometrial Biopsy (Pipelle) and Diagnostic Dilation and Curettage.
    Author: Xie B, Qian C, Yang B, Ning C, Yao X, Du Y, Shi Y, Luo X, Chen X.
    Journal: J Minim Invasive Gynecol; 2018; 25(4):724-729. PubMed ID: 29223698.
    Abstract:
    STUDY OBJECTIVE: To determine the risk factors for Pipelle diagnostic failure, which might help healthcare providers choose the appropriate protocol for endometrial evaluation individually. DESIGN: A single-center prospective study (Canadian Task Force classification II). SETTING: The Obstetrics and Gynecology Hospital of Fudan University. PATIENTS: Patients (n = 466) with an indication for endometrial biopsy. INTERVENTIONS: All patients received Pipelle and then diagnostic dilation and curettage. The samples were sent for histopathologic diagnosis separately. MEASUREMENTS AND MAIN RESULTS: The Pipelle procedure failed in 10 of 466 patients (2.146%). The general sample inadequacy and histopathologic diagnosis inconsistency of Pipelle was 5.921% (27/456) and 14.254% (65/456), respectively. Upon multivariate analysis, history of cervical operation(s) (odds ratio [OR], 26.510; 95% coefficient interval [CI], 2.932-239.784; p = .004), prior intrauterine procedure(s) (OR, .096; 95% CI, .017-.554; p = .009), and pinpoint cervical os (OR, 5.939; 95% CI, 1.134-31.108; p = .035) were significantly associated with Pipelle procedure failure. Meanwhile, uterine volume < 43 cm3 (OR, 8.229; 95% CI, 1.902-35.601; p = .005) and uneven endometrium detected by ultrasound (OR, .176; 95% CI, .042-.734; p = .017) had significant correlation with sample inadequacy. Pipelle detected all endometrial cancer cases, whereas only 50.000% (7/14) of endometrial hyperplasia with atypia, 26.471% (9/34) of polyps, and 18.182% (2/11) of polyps with endometrial hyperplasia without atypia cases were detected by Pipelle. CONCLUSION: Although Pipelle is the first-line method for endometrial biopsy, it might fail in women with risk factors identified in this study. More considerations should be taken when choosing Pipelle.
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