University Medical College The authars analysed 16 cases of skin tumor treated with external irvadiation from Sept. 1983 to Dec. 1986 at the Division of Therapeutic Radiology, Department of Radiology Catholic University Medical College. The results were as follows; I) The age ranged from 22 to 8 years. Male predominated over female(12: 4) 2) The histopathologic types of skin cancer were squamous cell carcinoma 10 cases, basal cell carcinoma and keratoacanthoma 2 cases each, Kimura's disease and mycosis fungoides 1 case each. The most common location of skin cancer was face aed extremity (4 cases each), followed by nose, lip and trunk (2 cases), eyelid and scalp(1 case). 3) The tumor dose of 2,000-7,000 cGy/2~7 weeks were delivered with a schedule of fractionation(5 fx./wk), depending on the type of histopathology. 4) Clinical respones were complete remi sion in 4 cases, partial remissian in 8 cases, improvement in 3 cases, no change in 1 case. 5) Local recurrence was noted in 2 cases, regional node metastasis in 2 caaes, and distant metastasis in 2 cases. 6) Erythema and pigmentation were seen in 10 cases, vesiculation and fibrosis in 5 cases, and ulceration in 1 case.