Peritoneal Washings in Endometrial Carcinoma

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Abstract
To correlate findings of peritoneal washings in patients with endometrial carcinoma with histologic parameters. Between 1995 and 1998, 298 women with endometrial carcinoma were treated by hysterectomy with intraoperative peritoneal washings (PW) at Memorial Sloan-Kettering Cancer Center. All cytology and pathology slides were available for review. Pathologic parameters of hysterectomy specimens were evaluated and correlated with the findings of PW. Thirty-two patients (10.7%) had abnormal PW. Two hundred sixty-two had endometrioid adenocarcinoma; 26 of them had abnormal PW (10.0%). Thirty-six patients had other histologic subtypes (papillary serous carcinoma, clear cell carcinoma and adenosquamous carcinoma), and six of them had abnormal PW (16.7%). The incidence of abnormal PW in the two groups was not significantly different (P = .78). Among 26 patients with endometrioid adenocarcinoma and abnormal PW, there were 17 cases (9.9%) of International Federation of Gynecology and Obstetrics (FIGO) grade 1, 7 (12.7%) of grade 2 and 2 (5.7%) of grade 3 (P = .56). Ten cases (14.9%) had no myometrial invasion, 10 (7.0%) had myometrial invasion of < or = 50% of myometrial thickness, and 6 (11.5%) had invasion of > 50% of myometrial thickness (P = .18). Vascular invasion was present in 8 cases (14.8%) and absent from 17 (8.2%) (P = .14). Eighteen patients (7.6%) had stage I/II disease, and eight patients (30.8%) had stage III/IV disease (P = .001). Among 298 patients, cervicovaginal smears performed before surgery were available for review in 76. Five of the 7 patients (71.4%) with abnormal PW and 37 of the 69 patients (53.6%) with normal PW had abnormal Pap smears (P = .45). Abnormal PW did not correlate with histologic subtypes, FIGO grade, depth of myometrial invasion, vascular invasion or abnormal Pap smears. A significantly higher incidence of abnormal PW was associated with stage III/IV disease.

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