Koji Matsuo1, Akira Yabuno2, Marianne S Hom3, Masako Shida4, Mamoru Kakuda5, Sosuke Adachi6, Rachel S Mandelbaum3, Yutaka Ueda5, Kosei Hasegawa2, Takayuki Enomoto6, Mikio Mikami4, Lynda D Roman7. 1. Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Southern California, Los Angeles, CA, USA; Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, USA. Electronic address: koji.matsuo@med.usc.edu. 2. Department of Obstetrics and Gynecology, Saitama University International Medical Center, Saitama, Japan. 3. Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Southern California, Los Angeles, CA, USA. 4. Department of Obstetrics and Gynecology, Tokai University School of Medicine, Kanagawa, Japan. 5. Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Osaka, Japan. 6. Department of Obstetrics and Gynecology, Niigata University School of Medicine, Osaka, Japan. 7. Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Southern California, Los Angeles, CA, USA; Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, USA.
Abstract
OBJECTIVE: To examine survival of women with stage I-II endometrioid endometrial cancer whose peritoneal cytology showed malignant or atypical cells (abnormal peritoneal cytology). METHODS: This is a multi-center retrospective study examining 1668 women with stage I-II endometrioid endometrial cancer who underwent primary hysterectomy with available peritoneal cytology results between 2000 and 2015. Abnormal peritoneal cytology was correlated to clinico-pathological characteristics and oncological outcome. RESULTS: Malignant and atypical cells were seen in 125 (7.5%) and 58 (3.5%) cases, respectively. On multivariate analysis, non-obesity, non-diabetes mellitus, cigarette use, and lympho-vascular space invasion were independently associated with abnormal peritoneal cytology (all, P<0.05). Abnormal peritoneal cytology was independently associated with decreased disease-free survival (hazard ratio 3.07, P<0.001) and cause-specific survival (hazard ratio 3.42, P=0.008) on multivariate analysis. Abnormal peritoneal cytology was significantly associated with increased risks of distant-recurrence (5-year rates: 8.8% versus 3.6%, P=0.001) but not local-recurrence (5.2% versus 3.0%, P=0.32) compared to negative cytology. Among women with stage I disease, abnormal peritoneal cytology was significantly associated with an increased risk of distant-recurrence in the low risk group (5-year rates: 5.5% versus 1.0%, P<0.001) but not in the high-intermediate risk group (13.3% versus 10.8% P=0.60). Among 183 women who had abnormal peritoneal cytology, postoperative chemotherapy significantly reduced the rate of peritoneal recurrence (5-year rates: 1.3% versus 9.2%, P=0.039) whereas postoperative radiotherapy did not (7.1% versus 5.5%, P=0.63). CONCLUSION: Our study suggests that abnormal peritoneal cytology may be a prognostic factor for decreased survival in women with stage I-II endometrioid endometrial cancer, particularly for low-risk group.
OBJECTIVE: To examine survival of women with stage I-II endometrioid endometrial cancer whose peritoneal cytology showed malignant or atypical cells (abnormal peritoneal cytology). METHODS: This is a multi-center retrospective study examining 1668 women with stage I-II endometrioid endometrial cancer who underwent primary hysterectomy with available peritoneal cytology results between 2000 and 2015. Abnormal peritoneal cytology was correlated to clinico-pathological characteristics and oncological outcome. RESULTS: Malignant and atypical cells were seen in 125 (7.5%) and 58 (3.5%) cases, respectively. On multivariate analysis, non-obesity, non-diabetes mellitus, cigarette use, and lympho-vascular space invasion were independently associated with abnormal peritoneal cytology (all, P<0.05). Abnormal peritoneal cytology was independently associated with decreased disease-free survival (hazard ratio 3.07, P<0.001) and cause-specific survival (hazard ratio 3.42, P=0.008) on multivariate analysis. Abnormal peritoneal cytology was significantly associated with increased risks of distant-recurrence (5-year rates: 8.8% versus 3.6%, P=0.001) but not local-recurrence (5.2% versus 3.0%, P=0.32) compared to negative cytology. Among women with stage I disease, abnormal peritoneal cytology was significantly associated with an increased risk of distant-recurrence in the low risk group (5-year rates: 5.5% versus 1.0%, P<0.001) but not in the high-intermediate risk group (13.3% versus 10.8% P=0.60). Among 183 women who had abnormal peritoneal cytology, postoperative chemotherapy significantly reduced the rate of peritoneal recurrence (5-year rates: 1.3% versus 9.2%, P=0.039) whereas postoperative radiotherapy did not (7.1% versus 5.5%, P=0.63). CONCLUSION: Our study suggests that abnormal peritoneal cytology may be a prognostic factor for decreased survival in women with stage I-II endometrioid endometrial cancer, particularly for low-risk group.
Authors: Koji Matsuo; Shinya Matsuzaki; David J Nusbaum; Hiroko Machida; Yoshikazu Nagase; Brendan H Grubbs; Lynda D Roman; Jason D Wright; Philipp Harter; Maximilian Klar Journal: Eur J Cancer Date: 2020-05-17 Impact factor: 9.162
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