This study was undertaken with several purposes in mind, namely, (1) to evaluate the clinical results of therapeutic measures employed by various dermatologists, (2) to analyze and correlate the clinical observations of epitheliomas seen in private practice, (3) to study the etiologic and clinical factors that have been stressed in the diagnosis of skin cancer, (4) to study the advantages and disadvantages of therapeutic modalities used in skin cancer and particularly the method of electrocoagulation and curettage which is commonly used among dermatologists. The subject material was drawn from the private practices of five Detroit dermatologists. The clinical cases represent patients from the average practice of dermatology in contrast to similar studies of selected groups from large dermatologic centers. The cases were taken in sequential order from pathology files,* and in each case the diagnosis was proved by microscopic examination. All cases were treated prior to July, 1950. The number