Efficacy and Safety of Thoracic Radiotherapy in Locally Advanced Non-Small Cell Lung Cancer Patients With Pre-Existing Interstitial Lung Diseases: A Single Center Experience of 85 Cases.

Honeycombing score > 1 and V20 ≥ 20% were significantly associated with high incidence of severe lung toxicities, leading to poor survival. However, patients at low risk might benefit from TRT with a considerable overall survival.