Hertzler,* in his admirable book on tumors, deals with neoplasms according to their location, and for further details the reader is referred to his volume. Many of the epithelial tumors, however, vary in malignancy, and hence in their clinical course, according to the region of the skin from which they arise. Also, it is impossible to treat tumors of different localities in the same way; for instance, one cannot treat a basal-celled cancer of the eyelid as he would a similar tumor upon the back.