David J Leffell, MDCMDavid P. Smith Professor Emeritus of Dermatology; Section Chief, Dermatologic Surgery and Cutaneous OncologyResearch InterestsGenes, p53Head and Neck NeoplasmsEpidermisCarcinoma, Basal CellCarcinoma, Squamous CellKeratosis, ActinicMelanomaMohs SurgeryUltraviolet RaysWound HealingSkin NeoplasmsView Full Profile