The treatment of lesions within the mouth with roentgen rays or radium has always been a procedure of the utmost difficulty. It is much more practicable with radium, but the holding of an applicator on one area for hours is intensely wearisome to the nurse, or to the patient if he does it himself. Besides this, it is practically impossible to hold the radium in exactly the same position for any length of time.
Five months ago a Polish girl, aged 6 years, was brought to me for the treatment of an extensive cavernous nevus of the internal surface of the right cheek and the lower lip. It encroached on the true skin beyond the vermilion border for an area of only about one-quarter by one-sixteenth inch (6 by 1.5 mm.) at the center of the lower lip. The cheek was nearly an inch in diameter at the most prominent