Derm Dx: Mid-scalp alopecia in a woman

An African American woman, aged 48 years, presents with marked alopecia of her mid-scalp that has progressed over several years. Her medical history is positive for adult-onset diabetes and hypertension, and she currently is taking several oral medications. In the past, she used hot combs and braided her hair. She denies itching and burning. Surrounding hairs reveal evidence of breakage, ...