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Model features three cancerous conditions - nodular basal cell (NBC), malignant melanoma (MM), morpheic basal cell (MBC); and three non-cancerous conditions - dysplastic nevi (DN), keratoacanthoma (KA), and actinic keratosis (KA). Also shows basal layer and dermal layer cross-section detail. Key card included. 4-1/2" x 1-1/4" without base.