Derm Dx: An enlarging, atrophic, erythematous patch on a woman's face

A 41-year-old woman presents with an enlarging lesion on the left side of her face that she first noted more than one year ago. The site is asymptomatic. She denies history of systemic disease and takes no oral medications. On physical examination, a well-demarcated, atrophic, erythematous patch with central scale is observed on the left side of her face. No ...