Multicenter analysis of recurrence and survival in stage IIIA endometrial cancer.

OBJECTIVE: To determine factors related to recurrence and survival in women with stage IIIA endometrial cancer; to examine outcomes of women with IIIA1 disease. METHODS: Multi-institutional analysis of women with stage IIIA endometrial carcinoma undergoing hysterectomy, bilateral salpingo-oophorectomy, lymphadenectomy, and pelvic cytology between 1980 and 2008. Overall survival (OS) and recurrence-free disease specific survival (RFDSS) were compared using Kaplan-Meier method, univariate and multivariate analyses. RESULTS: 98 women underwent surgical staging for stage IIIA endometrial carcinoma. Pelvic washings were positive in 53%, serosa in 18%, and adnexae in 45%. Forty were IIIA1; 58 were IIIA2 (adnexal/serosal involvement). Median number of lymph nodes was 19 (range 1-73). Adjuvant treatment was given to 88%: radiotherapy--21%, chemotherapy - 19%, chemotherapy and radiotherapy--19%, hormonal therapy--16%, and intraperitoneal P-32 - 11%. Five-year OS and RFDSS for IIIA1 were 77% and 76%, respectively; and for IIIA2 were 75% and 73%, respectively (p=NS for both). Patients with IIIA1 disease were less likely to receive chemotherapy or radiotherapy than those with IIIA2 disease (p=0.0035). Older age (Hazard ratio 1.24; 95% CI 1.00-1.54), non-Caucasian race (HR 5.35; 95% CI 1.96-14.5), and cervical metastases (HR 3.3; 95% CI 1.3-8.7) predicted lower RFDSS in multivariate analysis. Among 24 patients meeting NCCN's observation criteria (IIIA1, non-serous, and FIGO grade 1-2), 0/12 receiving adjuvant treatment recurred, while 1/12 not receiving adjuvant treatment recurred. CONCLUSIONS: Surgically assessed stage IIIA endometrial adenocarcinoma recurs in approximately 20-25% of cases. A subset of stage IIIA1 with very low risk factors may be appropriate candidates for observation.

Duke Scholars

Author Laura Jean Havrilesky Obstetrics and Gynecology, Gynecologic Oncology

Author Angeles Alvarez Secord Obstetrics and Gynecology, Gynecologic Oncology