This has increased risk of: (A) Squamous cell carcinoma, (B) Basal cell carcinoma, (C) Melanoma, (D) Liposarcoma
Answer is A. This is a cutaneous horn. Actinic (solar) keratoses (AK), i.e. cutaneous horns and keratoacanthomas, were considered to be premalignant lesions leading to SCC. Ref: Bailey and Love, 27e, page: 606