Model features three cancerous conditions - nodular basal cell (NBC), malignant melanoma (MM), morpheic basal cell (MBC); and three noncancerous conditions - dysplastic nevi (DN), keratoacanthoma (KA), and actinic keratosis (AK). Also shows basal layer and dermal layer cross section detail. Key card included. Model measures 4" dia. x 1-1/4".