Posthysterectomy cytology screening: indications and clinical implications.

Objective. To review the results of patients who were referred for posthysterectomy of abnormal cytology based on screening indications. Materials and Methods. We performed a retrospective review of 64 patients who have been referred for posthysterectomy vaginal colposcopy to the gynecologic oncology service. Patients' demographics, clinical features, reason for screening, and final diagnosis were recorded. Patients were divided into 2 groups based on posthysterectomy screening guidelines. Group A was considered to have undergone unnecessary screening based on national guidelines, and group B had risk factors that appropriately called for continued surveillance. The number of colposcopic examinations and the incidence of neoplasia were recorded for each group. Results. The mean age of the patients was 65 years (range = 35-95 y). Group A included 22 patients with history of abnormal cytology posthysterectomy for benign disease. Of the 22 abnormal cytology results, 21 were low-grade squamous intraepithelial lesion (n = 14) or atypical squamous cells of undetermined significance (n = 7) with 1 high-grade squamous intraepithelial lesion. After referral and colposcopy of this group, no neoplasia was found. Group B included 42 total patients. Of these 42 patients, 20 (48%) had a history of cervical intraepithelial neoplasia, 12 (28%) had a history of vaginal intraepithelial neoplasia, 6 (14%) had history of cervical cancer, 2 (5%) had history of diethylstilbestrol exposure, and 2 (5%) had a history of radiation therapy. In group B, 8 (9%) and 1 (2%) of the patients had vaginal intraepithelial neoplasia 2/3 and squamous cell carcinoma, respectively. Conclusions. Current national guidelines are appropriate. Adherence to these guidelines will decrease intervention and not affect the detection of vaginal neoplasia. Patients with risk factors for lower genital tract neoplasia warrant continued screening after hysterectomy.