Alopecic and Aseptic Nodules of the Scalp with Trichoscopic and Ultrasonographic Findings.

Alopecic and aseptic nodules of the scalp (AANS) is a rare entity, etiology of which is already unknown. It consists of a few dome-shaped, skin-colored nodules associated with nonscarring alopecia. They are usually located in the upper part of the occiput and surrounded by normal scalp.