Derm Dx: A flesh-colored lesion above the lip

A 73-year-old man presents for evaluation of a lesion above his lip, of approximately 1 year in duration. The site is traumatized by shaving but is otherwise asymptomatic. Past medical history is positive for actinic keratoses affecting his scalp and hands. Examination reveals a 2-mm flesh-colored papule with an indented center.