Derm Dx: Painful lesion of the ear

A 68-year-old man comes to the clinic complaining of a painful lesion affecting his right ear. The lesion has been present for several months. He is in good health, does not smoke, and has no history of skin cancer. Examination reveals a 0.5-cm crusted patch with a slightly denuded and hemorrhagic center. Cervical lymph nodes are nonpalpable.