TRICHOSCOPY OF ANDROGENETIC ALOPECIA
Trichoscopy of Androgenetic Alopecia: Brief Overview
Trichoscopy of androgenetic alopecia (AGA) showing a variation in the caliber of hairs that are present. This is known as “anisotrichosis.” Many thick terminal hairs are present in this image and so are many miniaturized hairs and tiny tiny vellus hairs that are difficult to even see.
A few follicular units still contain two hair fibers but most contain just a single hair.
A subtle brown halo is present around some hairs known as the brown peripilar sign (BPPS). This represents a follicle with a bit of inflammation underneath the scalp (in an area know as the isthmus and infundibulum).
This article was written by Dr. Jeff Donovan, a Canadian and US board certified dermatologist specializing exclusively in hair loss.