Derm Dx: A nodule on the forearm

A 70-year-old man requests treatment for a lesion of his left forearm. The growth has been present for at least two years and has been slowly increasing in size. He gives a history of hypertension and hyperlipidemia. Examination reveals a 3-cm nodule that is not fixed to underlying tissue. Pressure elicits minimal tenderness. No similar lesions are noted elsewhere.