A 71-Year-Old Male Presents for Evaluation of Painless Bump on His Chin

A 71-year-old, previously healthy man presents for evaluation of a new, solitary, painless, pedunculated bump on his chin. Past medical history is negative for surgery or transfusion, and he denies intravenous drug use. His review of systems is negative with the exception of complaints about mild right-sided postero-lateral flank pain.

Pick the best choice for what should be done first: