Effectiveness and Safety of Simultaneous Integrated Boost-Proton Beam Therapy for Localized Pancreatic Cancer. (29th June 2018)

• Record Type: Journal Article
• Authors: Kim, Tae Hyun; Lee, Woo Jin; Woo, Sang Myung; Kim, Hyunjung; Oh, Eun Sang; Lee, Ju Hee; Han, Sung-Sik; Park, Sang-Jae; Suh, Yang-Gun; Moon, Sung Ho; Kim, Sang Soo; Kim, Dae Yong
• Is Part Of: Technology in cancer research & treatment. Volume 17(2018)
• Publication Date: 2018-06-29
• Subjects: pancreas cancer -- proton beam therapy -- overall survival; Oncology -- Periodicals; Cancer -- Diagnosis -- Periodicals; Cancer -- Treatment -- Technological innovations -- Periodicals; 616.994
• DOI: 10.1177/1533033818783879
• Languages: English
• ISSNs: 1533-0346

Abstract

Purpose: To evaluate the clinical effectiveness and feasibility of simultaneous integrated boost-proton beam therapy in patients with localized pancreatic cancer. Methods: Thirty-seven patients with localized pancreatic cancer underwent simultaneous integrated boost-proton beam therapy, and 8 (21.6%) patients received induction chemotherapy. The internal target volume was obtained by summing the gross tumor volumes in exhalation phase computed tomography images. Planning target volume 1 included internal target volume plus 3 to 5 mm margins, excluding the 5 mm expanded volume of gastrointestinal structures, and planning target volume 2 included the internal target volume plus 7 to 12 mm margins. The prescribed doses to planning target volume 1 and planning target volume 2 were 45 GyE (equivalent dose in 2 Gy, 54.4 GyE10 ) and 30 GyE (equivalent dose in 2 Gy, 32.5 GyE10 ) in 10 fractions, respectively. Results: Overall, treatment was well tolerated, with no grade of toxicity ≥3. Median overall survival was 19.3 months, and 1-year local progression-free survival, relapse-free survival, and overall survival rates were 64.8%, 33.2%, and 75.7%, respectively. Patients treated with simultaneous integrated boost-proton beam therapy after induction chemotherapy had a significantly higher median overall survival time compared to those with simultaneous integrated boost-proton beam therapy alone (21.6 months vs 16.7 months, P = .031). Multivariate analysis showed that induction chemotherapy was a significant factor for overall survival ( P < .05). Conclusions: Simultaneous integrated boost-proton beam therapy could be feasible and promising for patients with localized pancreatic cancer.