Hypofractionated Stereotactic Body Radiation Therapy With Simultaneous Integrated Boost and Simultaneous Integrated Protection in Pancreatic Ductal Adenocarcinoma.

Clinical Oncology : a Journal of the Royal College of Radiologists
N SimoniR Mazzarotto

Abstract

To evaluate the safety and feasibility of stereotactic body radiation therapy (SBRT) with simultaneous integrated boost (SIB) and simultaneous integrated protection (SIP) in borderline resectable and locally advanced pancreatic ductal adenocarcinoma. Patients receiving SBRT following induction chemotherapy from January 2017 to December 2018 were included in this observational analysis. SBRT was delivered in five consecutive daily fractions by administering 30 Gy to the planning target volume while simultaneously delivering a 50 Gy SIB to the tumour-vessel interface. SIP was created by lowering the dose to 25 Gy on the overlap area between the planning target volume and the planning organ at risk volume. The primary end point was acute and late gastrointestinal grade ≥3 toxicity. Secondary end points were freedom from local progression, overall survival and progression-free survival (PFS). Fifty-nine consecutive patients (27 borderline resectable and 32 locally advanced) were included. Fifty-eight patients (98.3%) completed the SBRT planned treatment and 35 patients (59.4%) received surgical resection following SBRT. No acute or late grade ≥3 SBRT-related adverse events were observed. The median follow-up time was 15.1 months in...Continue Reading

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