Half-body irradiation: A safe and acceptable treatment

Background: The aim of this study was all evaluation of the acute toxicity of single-fraction half-body irradiation (HBI). Material/Methods: The material comprised 92 patients. Upper, lower, and middle HBI (UHBI, LHBI, MHBI) were performed in 34, 49, and 9 cases, respectively, with 6 Gy delivered for UHBI, 8 Gy for LHBI, and 6 or 8 Gy for MHBI. The patients weights were measured on the HBI day. Two weeks later their weights and blood parameters were checked and diarrhea, skin toxicity (scale: 0-4), and nausea were evaluated using WHO Toxicity Criteria. Items of all the evaluated symptoms were summarized and the means of the sums were calculated. Results: Mean weight loss after HBI was 0.7 kg. One patient had grade 4 toxicity (thrombopenia). Grade 3 toxicity appeared ill 9 cases (nausea and vomiting in 5, leukopenia in 1, and thrombopenia in 3). None had radiation pneumonitis. The means of the summarized items were 1.9 for UHBI than 1.4 for LBHI. The means of the summarized items were 1.6 for 8 Gy and 1.8 for 6 Gy. UHBI provoked a higher incidence and intensity of nausea and vomiting and LHBI caused a higher incidence and intensity of diarrhea. The remaining evaluated symptoms of toxicity were similar for irradiations of both halves of the body. Conclusions: From these results one can conclude that single-dose (6-8 Gy) HBI is a safe treatment, causing a low percentage of low-level, patient-acceptable adverse radiation sequels.