Abstract
A prospective Phase II study was done to investigate the treatment results of combined external beam and intraluminal radiotherapy in roentogenographically occult inoperable endobronchial carcinoma. In 41 patients (all male) with roentogenographically occult endobronchial carcinoma, a combination of external beam radiotherapy using linac x-ray and intraluminal low dose rate brachytherapy via 192Ir thin wire (1.48 GBq) was performed. External beam radiotherapy comprised of 40 Gy in 20 fractions over 4 weeks was carried out, whereas intraluminal brachytherapy consisted of 25 Gy in five fractions over 2.5-5 weeks. The dose reference point for brachytherapy varied (3-9 mm) according to a diameter of the bronchus. Excluding two cases in which bronchoscopy was refused (1) and was still being treatment (1), 39 patients were treated according to plan. By the last intraluminal brachytherapy, no tumor was endoscopically identifiable in all cases. The follow-up period ranged from 1-41 months, with a median of 24.5 months. Recurrence occurred in two cases, with subsequent surgery: one is alive without cancer and the other died of uncontrolled lung cancer at 35 months. Radiation pneumonitis was observed in two cases for whom glucocorticoid ...Continue Reading
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