As has been strongly emphasized by many therapeutists,1 the earlier in life a hemangioma is treated, the more ready the response to irradiation, the better the cure and the smaller the ultimate disfigurement. There has been, however, a regrettable tendency among physicians as well as laymen to put off treatment of a birthmark of this type until later in life, in the mistaken belief that it may disappear of itself or, if it does not do so, that the child may later be better able to tolerate treatment. But experience has shown that, far from the child's outgrowing the lesion, hemangioma tends to grow along with normal development of the child. It is also a known fact that the younger the tissue the more sensitive it is to irradiation and therefore the earlier the treatment the easier to eradicate the lesion. There has also been a fear that if