It is suggested that the designation of erythroplasia of Queyrat should be restricted to cases of Bowen's disease or intraepithelial carcinoma of the glans penis in order to exclude more clearly the benign erythroplasias of the penis. Therapeutic measures should be directed at cure but also the maintenance of sexual and urethral function and sensation when possible. Traditionally, both invasive carcinoma and carcinoma‐in‐situ have been treated by amputation, electrosurgical dessication, or radiation therapy, and more recently topical chemotherapy for the superficial lesions. A mold technique with accurate dosimetry is described for use in an extensive case of erythroplasia of Queyrat involving the glans, prepuce and two‐thirds of the shaft with a successful early result and preservation of function and sensation to date.