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Kim KN, Heintz J, Yegya-Raman N, Cohen R, Kegelman T, Cengel K, Marmarelis M, Sun L, Langer C, Aggarwal C, Singh A, Singhal S, Kucharczuk J, Robinson K, Feigenberg S. Toxicities and Deaths From Intercurrent Disease Following Contemporary Postoperative Radiotherapy in Resected Non-Small-Cell Lung Cancer. Clin Lung Cancer 2023; 24:e78-e86. [PMID: 36628846 DOI: 10.1016/j.cllc.2022.12.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 12/04/2022] [Accepted: 12/16/2022] [Indexed: 12/26/2022]
Abstract
INTRODUCTION The role of postoperative radiotherapy (PORT) in patients with resected locally advanced non-small-cell lung cancer (NSCLC) remains controversial due to the radiation techniques used in randomized trials. We conducted a retrospective cohort study evaluating contemporary PORT techniques to evaluate the safety of PORT and risk of death from intercurrent disease . MATERIALS AND METHODS We analyzed consecutive patients with NSCLC treated in a single center that underwent PORT for pN2 disease and/or positive margin, with 3-dimensional conformal radiotherapy (3DRT), intensity modulated radiotherapy , or proton RT (PRT), between 2008 and 2019. Clinical details were collected including intercurrent deaths, defined as death without cancer recurrence. Kaplan-Meier and Cox-Proportional Hazards Models were used. RESULTS Of 119 patients, 21 (17.6%) received 3DRT, 47 (39.5%) intensity modulated radiotherapy, and 51 (42.9%) PRT. Median follow-up was 40 months (range 8-136) and median RT dose was 5040cGy. Most patients (65.5%) received sequential adjuvant chemoRT; 18.5% received concurrent chemoRT. The rate of grade 3 toxicities was 9.2%. There were 13 (10.9%) deaths from intercurrent diseases, including 6 from second primary cancers and 2 from cardiopulmonary diseases. There were 2 additional deaths from cardiopulmonary disease in patients with cancer progression at time of death. Mean, V5Gy, V30Gy heart doses and mean lung doses were significantly lower with PRT. Three-year OS and disease-free-survival were 70.1% and 49.9%. CONCLUSION PORT using contemporary techniques was well tolerated with acceptable toxicity and low rates of intercurrent deaths. Proton therapy significantly reduced heart and lung doses, but radiotherapy modality was not associated with differences in intercurrent disease.
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Affiliation(s)
- Kristine N Kim
- Department of Radiation Oncology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA.
| | - Jonathan Heintz
- Department of Radiation Oncology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Nikhil Yegya-Raman
- Department of Radiation Oncology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Roger Cohen
- Division of Hematology Oncology, Department of Internal Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Timothy Kegelman
- Department of Radiation Oncology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Keith Cengel
- Department of Radiation Oncology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Melina Marmarelis
- Division of Hematology Oncology, Department of Internal Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Lova Sun
- Division of Hematology Oncology, Department of Internal Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Corey Langer
- Division of Hematology Oncology, Department of Internal Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Charu Aggarwal
- Division of Hematology Oncology, Department of Internal Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Aditi Singh
- Division of Hematology Oncology, Department of Internal Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Sunil Singhal
- Division of Thoracic Surgery, Department of Surgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - John Kucharczuk
- Division of Thoracic Surgery, Department of Surgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Kyle Robinson
- Division of Hematology Oncology, Department of Internal Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
| | - Steven Feigenberg
- Department of Radiation Oncology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
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