Abstract #5427

MR-HIFU mild hyperthermia for recurrent rectal cancer: updated results from a phase I clinical trial

William Chu¹, Robert M Staruch², Samuel Pichardo^3,4, Yuexi Huang⁵, Merrylee McGuffin¹, Ruby Endre⁵, Gregory Czarnota⁶, and Kullervo Hynynen⁵

¹Radiation Oncology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada, ²Clinical Sites Research Program, Philips Research, Cambridge, MA, United States, ³Thunder Bay Regional Research Institute, Thunder Bay, ON, Canada, ⁴Electrical Engineering, Lakehead University, Thunder Bay, ON, Canada, ⁵Physical Sciences Platform, Sunnybrook Research Institute, Toronto, ON, Canada, ⁶Radiation Oncology, Sunnybrook Health Sciences Centre, Toronto, ON, Canada

We present the updated results of our phase I trial that delivers mild hyperthermia using magnetic resonance-guided high intensity focused ultrasound (MR-HIFU) combined with radiation and chemotherapy in the treatment of locally recurrent rectal cancer. Participation in the study is based on careful consideration of patient and tumor factors. MR-HIFU mild hyperthermia was delivered in three sessions during a 17-day regimen. MR-HIFU mild hyperthermia was successfully delivered and the procedure was well tolerated. No adverse effects have been reported following the combined treatment to date.

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