The impact of induction chemotherapy and the associated tumor response on subsequent radiation-related changes in lung function and tumor response.

Published

Journal Article

PURPOSE: To assess the impact of induction chemotherapy, and associated tumor shrinkage, on the subsequent radiation-related changes in pulmonary function and tumor response. METHODS AND MATERIALS: As part of a prospective institutional review board-approved study, 91 evaluable patients treated definitively with thoracic radiation therapy (RT) for unresectable lung cancer were analyzed. The rates of RT-associated pulmonary toxicity and tumor response were compared in the patients with and without pre-RT chemotherapy. In the patients receiving induction chemotherapy, the rates of RT-associated pulmonary toxicity and tumor response were compared in the patients with and without a response (modified Response Evaluation Criteria in Solid Tumor criteria) to the pre-RT chemotherapy. Comparisons of the rates of improvements in pulmonary function tests (PFTs) post-RT, dyspnea requiring steroids, and percent declines in PFTs post-RT were compared in patient subgroups using Fisher's exact test, analysis of variance, and linear or logistic regression. RESULTS: The use of pre-RT chemotherapy appears to increase the rate of radiation-induced pneumonitis (p = 0.009-0.07), but has no consistent impact on changes in PFTs. The degree of induction chemotherapy-associated tumor shrinkage is not associated with the rate of subsequent RT-associated pulmonary toxicity. The degree of tumor response to chemotherapy is not related to the degree of tumor response to RT. CONCLUSIONS: Additional study is needed to better clarify the impact of chemotherapy on radiation-associated disfunction.

Full Text

Duke Authors

Cited Authors

  • Mao, J; Kocak, Z; Zhou, S; Garst, J; Evans, ES; Zhang, J; Larrier, NA; Hollis, DR; Folz, RJ; Marks, LB

Published Date

  • April 1, 2007

Published In

Volume / Issue

  • 67 / 5

Start / End Page

  • 1360 - 1369

PubMed ID

  • 17276621

Pubmed Central ID

  • 17276621

International Standard Serial Number (ISSN)

  • 0360-3016

Digital Object Identifier (DOI)

  • 10.1016/j.ijrobp.2006.11.003

Language

  • eng

Conference Location

  • United States