title: Lung cancer: retreatment of local recurrence after definitive irradiation.
abstract: Aggressive radiation therapy for the management of inoperable lung cancer has increased tumor control and survival. However, approximately 20% of patients continue to experience local recurrence as the sole manifestation of treatment failure. Seven hundred thirty-four patients were initially treated by radiation therapy for inoperable lung cancer, for recurrence after resection, or as adjunct postoperative therapy. Twenty-nine patients were referred for retreatment of cancer that recurred within the original treatment field. Following retreatment, 14 of 29 patients (48%) had a favorable subjective response, and 20 of 27 patients (74%) a favorable objective response. A favorable response was observed for all cell types and over a wide range of retreatment dosages. Symptomatic radiation pneumonitis developed in one patient, rib sclerosis and fracture developed in another. Th median survival after onset of retreatment was five months with a range of one month to 54 months. The clinically determined mechanisms of death were persistent intrathoracic disease in 14 of 25 patients (56%), intrathoracic disease and distant metastasis in 7 of 25 (28%), distant metastasis in 3 of 25 (12%), and unknown in 1 of 25 (4%).
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000401:mortality / Q000532:radiotherapy* / Q000601:surgery; D008297:Male; D008479:Mediastinal Neoplasms / Q000556:secondary; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000532:radiotherapy*; D011379:Prognosis; D013997:Time Factors