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  • Title: 20 years of experience in static intensity-modulated total-body irradiation and lung toxicity. Results in 257 consecutive patients.
    Author: Schneider RA, Schultze J, Jensen JM, Hebbinghaus D, Galalae R, Kimmig BN.
    Journal: Strahlenther Onkol; 2007 Oct; 183(10):545-51. PubMed ID: 17896085.
    Abstract:
    PURPOSE: To analyze lung complications after allogeneic or autologous transplantation following total-body irradiation (TBI) with compensators, so-called sIMRT (static intensity-modulated radiotherapy). PATIENTS AND METHODS: Between 1983 and 1998, 257 patients with different hematologic malignancies underwent TBI in six fractions to a total dose of 12 Gy within 3 consecutive days (212 with 11 Gy lung dose) prior to allogeneic (n=174) or autologous (n=83) transplantation. 40 patients were <16 years of age. Minimum follow-up time was 5 years. Median follow-up period was 110 months (13-231 months). RESULTS: 5-year survival rate was 47.9%, 5-year tumor-related mortality 23%, 5-year treatment-related mortality 29.2% (12 Gy lung dose: 53.3%+/-14.6%, 11 Gy: 24.1%+/-5.7%). Interstitial pneumonitis (IP) developed in 28 of 257 patients (10.9% +/- 3.8%). IP incidences in the allogeneic and autologous groups were 14.4% (+/-5.6%) and 3.6% (0-7.6%), respectively. IP incidences with 12/11 Gy lung dose were 22% (+/-12%)/8.5% (+/-3.7%). IP mortality was 9.3% (+/-3.6%). 13 of 28 patients with IP had a cytomegalovirus infection, five an acute graft-versus-host disease grade IV of the lungs. IP incidences with 12/11 Gy lung dose were 25% (9-50%)/4.2% (0.2-19.1%) in patients <16 years, and 20.7% (9.4-37.4%) and 13.3% (+/-6.5%) in older patients after allogeneic transplantation. CONCLUSION: Compensator-generated static intensity-modulated TBI with a total dose of 12 Gy and a lung dose of 11 Gy is a modern and comfortable treatment with moderate lung toxicity, small dose inhomogeneities and little setup failure before transplantation. Especially patients <16 years of age benefit from lung dose reduction.
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