Abstract
1) Roentgen therapy was attempted to 118 school children affected with chronic sinusitis. No other treatment was given. 2) The curative effect of the roentgen therapy became more prominent as the time elasped, im- provement was observedin 44.7% immediatly after the irradiation, in 46.9% 1 month, in 50.0% 3 months and in 54.4% 6 months after the treatment. 3) The best results were obtained in younger children whose sinusitis were catarrhal type without significant changes of the nasal mucous menbrane. 4) From these results the conclusion was made that the roentgen therapy seemed to be one of the valuable conservative trertments of chronic sinusitis in children if the indication of the treatment was carefully studied.
