S2903
RTT- RTT operational practice and workflow innovations
ESTRO 2026
Keywords: SGRT, stereotactic radiosurgery, setup accuracy
and November 2024 (Fig. 1). Grade 2 skin reactions were seen between and/or on the buttocks for 17 patients (57%), nine (30%) of whom had a Grade>1 at start of radiotherapy. Grade > 1 skin reactions were noted in the groin area in 14 patients (47%), whereof 12 were classified as hygiene/heat related. Three patients did not complete their three-month follow- up.Pruritus, pain of skin or ulceration were not seen in the study population. For 14 patients (47%) an increase in CTCAE were observed (Fig 2) and subsequent film measurement was performed. A mean [range] absolute dose difference of 0.2Gy [-0.2– 0.8] was seen between treatment plan and measured film dose. Skin care instructions resulted in reduced tissue disorder symptoms for 16 patients.
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Prospective investigation of skin reactions during volumetric modulated arc therapy (VMAT) of the prostate Malin Jansson 1 , Anne-Kari Klavsen 1 , Jonas Scherman 2 , Jonas Magnusson 3 , Joakim Larsson 3 , Elinore Wieslander 2 , Adalsteinn Gunnlaugsson 1,4 , Emilia Persson 2,5 1 Oncology, Department of Hematology, Oncology and Radiation Physics, Skåne University Hospital, Lund, Sweden. 2 Radiation Physics, Department of Hematology, Oncology and Radiation Physics, Skåne University Hospital, Lund, Sweden. 3 Medical Radiation Physics, Department of Clinical Sciences, Lund University, Lund, Sweden. 4 Faculty of Medicine, Department of Clinical Sciences, Lund University,
Lund, Sweden. 5 Medical Radiation Physics, Department of Translational Medicine, Lund University, Malmö, Sweden
Purpose/Objective: In volumetric modulated arc therapy (VMAT) planning for prostate cancer, efforts are made to deliver a conform treatment which may redistribute the dose to other areas, such as the skin. Skin reactions associated with VMAT-treatment for prostate cancer have, to our knowledge, not been thoroughly studied.Here we present the results from a prospective study (Dnr 2023-06678-01) investigating skin reactions during modern curative radiotherapy of the prostate. Material/Methods: Patients prescribed curative radiotherapy of the prostate or prostate bed, with or without vesicle and nodal involvement, were included. The study protocol included assessment of skin tissue disorders, pruritus, pain of skin, ulceration and radiation dermatitis according to Common Terminology Criteria for Adverse Events (CTCAE) 5.0 [1] in the groin and buttocks. Assessment and photo documentation of the skin took place at start, during, at the end of, and 3 months after end of radiotherapy. A dose measurement with film was performed for patients with increased CTCEA during treatment. Skin care instructions, including verbal information about cleanliness, hygiene, aeration and hydration of the skin, were given when CTCAE >2 in any criteria. Results: A total of 30 patients were included between January
Conclusion: Skin reactions are prevalent during VMAT-treatments
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