Derm Dx: Recurring pus bumps on the scalp

A patient, aged 34 years, presented with complaints of “pus bumps” in his scalp for many years. The bumps eventually healed with scarring. The patient stated that he had been doing well and had not had significant lesions over past several months.

On exam, significant scarring, alopecia of the scalp, and doll’s hairs (multiple hairs coming through a singular follicular ostium) ...