Estimation of Mediastinal Toxicities after Radiotherapy for Hodgkin Lymphoma—A Normal Tissue Complication Analysis of the HD16/17 Trial by the German Hodgkin Study Group

Author:

Oertel Michael1ORCID,Hölscher Priska1,Hering Dominik1ORCID,Kittel Christopher1,Fuchs Michael2ORCID,Haverkamp Uwe1,Borchmann Peter2,Eich Hans Theodor1

Affiliation:

1. Department of Radiation Oncology, University Hospital Muenster, 48149 Muenster, Germany

2. Department of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne, Dusseldorf, University Hospital of Cologne, 50937 Cologne, Germany

Abstract

Purpose: Hodgkin lymphoma is a hematologic malignancy with excellent outcomes even in advanced stages. Consequently, the importance of treatment-associated toxicity increases. However, the exact estimation of individualized rates is difficult due to different disease extents, treatment strategies and techniques. The following analysis aims at a pre-treatment estimation of relevant mediastinal toxicities. Methods: Normal tissue complication probability calculations were used to evaluate the toxicity rates for the heart, lungs and female breast of patients undergoing radiotherapy for early-stage Hodgkin lymphoma. Overall, 45 Patients of the HD16 and HD17 trials by the German Hodgkin study group were included and risks were calculated using the Lyman–Kutcher–Burman model. Results: The median values for pericarditis, pneumonitis and fibrosis of the left or right breast were 0.0%, 0.0%, 0.7% and 0.6% in the HD16 cohort, and 0.0%, 0.1%, 1.1% and 1.0% in the HD17 cohort, respectively. Correspondingly, none of the included patients displayed any of the evaluated toxicities during clinical follow-up. The use of higher doses (30 Gy) in the HD17 cohort led to an increase in toxicity compared to the HD16 cohort (20 Gy). No significant influence of the planning target volume size or the radiation technique could be found in this study. Conclusion: Both the clinically observed and calculated toxicity rates corroborate the overall low-risk profile of radiotherapy for Hodgkin lymphoma. Further treatment individualization will be attempted in the future.

Funder

German Cancer Aid

Publisher

MDPI AG

Reference40 articles.

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