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Early Assessment of Response to Neoadjuvant Chemotherapy with 18F-FDG-PET/CT in Patients with Advanced-Stage Ovarian Cancer

 Young Shin Chung  ;  Hyun-Soo Kim  ;  Jung-Yun Lee  ;  Won Jun Kang  ;  Eun Ji Nam  ;  Sunghoon Kim  ;  Sang Wun Kim  ;  Young Tae Kim 
 CANCER RESEARCH AND TREATMENT, Vol.52(4) : 1211-1218, 2020-10 
Journal Title
Issue Date
Neoadjuvant therapy ; Ovarian neoplasms ; Positron emission tomography computed tomography ; Treatment outcome
Purpose: The aim of this study was to evaluate the ability of sequential 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG-PET/CT) after one cycle of neoadjuvant chemotherapy (NAC) to predict chemotherapy response before interval debulking surgery (IDS) in advanced-stage ovarian cancer patients. Materials and methods: Forty consecutive patients underwent 18F-FDG-PET/CT at baseline and after one cycle of NAC. Metabolic responses were assessed by quantitative decrease in the maximum standardized uptake value (SUVmax) with PET/CT. Decreases in SUVmax were compared with cancer antigen 125 (CA-125) level before IDS, response rate by Response Evaluation Criteria in Solid Tumors criteria before IDS, residual tumor at IDS, and I chemotherapy response score (CRS) at IDS. Results: A 40% cut-off for the decrease in SUVmax provided the best performance to predict CRS 3 (compete or near-complete pathologic response), with sensitivity, specificity, and accuracy of 81.8%, 72.4%, and 72.4%, respectively. According to this 40% cut-off, there were 17 (42.5%) metabolic responders (≥ 40%) and 23 (57.5%) metabolic non-responders (< 40%). Metabolic responders had higher rate of CRS 3 (52.9% vs. 8.7%, p=0.003), CA-125 normalization (< 35 U/mL) before IDS (76.5% vs. 39.1%, p=0.019), and no residual tumor at IDS (70.6% vs. 31.8%, p=0.025) compared with metabolic non-responders. There were significant associations with progression-free survival (p=0.021) between metabolic responders and non-responders, but not overall survival (p=0.335). Conclusion: Early assessment with 18F-FDG-PET/CT after one cycle of NAC can be useful to predic response to chemotherapy before IDS in patients with advanced-stage ovarian cancer.
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1. College of Medicine (의과대학) > Dept. of Nuclear Medicine (핵의학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Obstetrics and Gynecology (산부인과학교실) > 1. Journal Papers
Yonsei Authors
Kang, Won Jun(강원준) ORCID logo https://orcid.org/0000-0002-2107-8160
Kim, Sang Wun(김상운) ORCID logo https://orcid.org/0000-0002-8342-8701
Kim, Sung Hoon(김성훈) ORCID logo https://orcid.org/0000-0002-1645-7473
Kim, Young Tae(김영태) ORCID logo https://orcid.org/0000-0002-7347-1052
Nam, Eun Ji(남은지) ORCID logo https://orcid.org/0000-0003-0189-3560
Lee, Jung-Yun(이정윤) ORCID logo https://orcid.org/0000-0001-7948-1350
Chung, Young Shin(정영신)
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