THE USE OF HIGH-DOSE RATE ENDOBRONCHIAL BRACHYTHERAPY TO PALLIATE SYMPTOMATIC ENDOBRONCHIAL RECURRENCE OF PREVIOUSLY IRRADIATED BRONCHOGENIC-CARCINOMA

Thirty-eight patients were treated with high dose rate endobronchial brachytherapy to palliate symptoms (cough, hemoptysis, fever, and/or shortness of breath) caused by endobronchial recurrence of previously irradiated (greater-than-or-equal-to 5000 cGy) bronchogenic carcinoma. The dose per fraction was 600 cGy at a radius of 1 cm from the center of the linear path of the source, and each patient received three fractions, each fraction separated by a 1-week interval. Twenty-nine patients (76%) had symptomatic improvement, 16 with complete and 13 with partial relief of symptoms. The likelihood of symptom relief was greater in those patients who had extrabronchial tumor measuring < 5 cm (15/15) compared to those with extrabronchial tumor measuring greater-than-or-equal-to 5 cm (2/8). The median duration of symptom relief was 7.5 months. Repeat bronchoscopy done 3 months after brachytherapy revealed that 41% (11/27) had complete tumor regression and another 41% (11/27) had partial regression. Nine of 14 patients with post-obstructive atelectasis/pneumonitis had radiographic improvement. Twelve patients (32%) died from massive hemoptysis occurring 2-56 weeks (median 10 weeks) after brachytherapy. Location of the recurrence was the most important predictor of pulmonary hemorrhage. It occurred only in patients with recurrence in the right upper lobe, right mainstem, or left upper lobe bronchus. Whether this high rate of fatal pulmonary hemorrhage was a real phenomenon or a statistical fluke of small numbers remains an unanswered question.