L E Stewart1, T L Beck1, N V Giannakopoulos2, M H Rendi2, C Isacson3, B A Goff4. 1. Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, University of Washington Medical Center, Seattle, WA, USA. 2. Department of Pathology, University of Washington Medical Center, Seattle, WA, USA. 3. CellNetix Pathology & Laboratories, Seattle, WA, USA. 4. Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, University of Washington Medical Center, Seattle, WA, USA. Electronic address: bgoff@uw.edu.
Abstract
OBJECTIVES: Low grade endometrial stromal sarcoma (LG-ESS) is a rare cancer with an indolent course. We aimed to assess the effectiveness of adjuvant hormonal suppression (HT) with or without oophorectomy (BSO) in prolonging progression free survival (PFS) and overall survival (OS) in patients with LG-ESS. METHODS: We performed a multi-institutional retrospective review of patients treated for low grade LG-ESS from 1985 to 2014. Demographics, treatment and recurrence data were abstracted from medical records. Pathologic diagnosis was confirmed by a gynecologic pathologist. Long-term patient-reported outcomes were obtained via mailed survey. RESULTS: One-hundred-twelve patients underwent surgery for LG-ESS; 59 had postoperative data with a median follow-up of 55months (1-325months). The mean age at diagnosis was 48.5years (22-82years). Forty-nine (61%) had stage I disease. The most common presenting symptoms were abnormal uterine bleeding (38%) and pelvic mass (17%). Seventy-one (63%) patients had BSO at the time of diagnosis. Of the 59 patients with postoperative follow-up information, 49 (73%) underwent BSO, 26 (44%) received HT, 20 (33%) were expectantly managed, and 6 (10%) received chemotherapy, radiation or both. Median PFS for the entire group was 53months and OS was 63months. PFS for those who underwent BSO compared with those who retained their ovaries was 38 vs 11months, p=0.071. PFS for HT vs no HT was 28 vs 23months, p=0.77. CONCLUSIONS: Consistent with prior series, our results support BSO to prolong PFS in LG-ESS but are limited by sample size. Larger studies with more complete follow-up are needed to determine the effect of adjuvant hormonal suppression.
OBJECTIVES: Low grade endometrial stromal sarcoma (LG-ESS) is a rare cancer with an indolent course. We aimed to assess the effectiveness of adjuvant hormonal suppression (HT) with or without oophorectomy (BSO) in prolonging progression free survival (PFS) and overall survival (OS) in patients with LG-ESS. METHODS: We performed a multi-institutional retrospective review of patients treated for low grade LG-ESS from 1985 to 2014. Demographics, treatment and recurrence data were abstracted from medical records. Pathologic diagnosis was confirmed by a gynecologic pathologist. Long-term patient-reported outcomes were obtained via mailed survey. RESULTS: One-hundred-twelve patients underwent surgery for LG-ESS; 59 had postoperative data with a median follow-up of 55months (1-325months). The mean age at diagnosis was 48.5years (22-82years). Forty-nine (61%) had stage I disease. The most common presenting symptoms were abnormal uterine bleeding (38%) and pelvic mass (17%). Seventy-one (63%) patients had BSO at the time of diagnosis. Of the 59 patients with postoperative follow-up information, 49 (73%) underwent BSO, 26 (44%) received HT, 20 (33%) were expectantly managed, and 6 (10%) received chemotherapy, radiation or both. Median PFS for the entire group was 53months and OS was 63months. PFS for those who underwent BSO compared with those who retained their ovaries was 38 vs 11months, p=0.071. PFS for HT vs no HT was 28 vs 23months, p=0.77. CONCLUSIONS: Consistent with prior series, our results support BSO to prolong PFS in LG-ESS but are limited by sample size. Larger studies with more complete follow-up are needed to determine the effect of adjuvant hormonal suppression.
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