Targetoid Polycyclic Concentric Hair Regrowth Pattern Is a Sign of Immunological Recovery in Alopecia Areata
January 2018
in “
Journal of Cosmetics Dermatological Sciences and Applications
”
TLDR A targetoid hair regrowth pattern indicates recovery in alopecia areata.
The study observed a targetoid polycyclic concentric hair regrowth pattern in 7 male patients with alopecia areata, aged 4 to 25 years, as a sign of immunological recovery following treatment. This pattern, characterized by alternating circles of complete and incomplete hair regrowth, was considered rare and indicative of recovery. The study suggested that this phenomenon might be due to regional variations in immune response, where areas with a stronger immune reaction show less hair regrowth, while areas with a normal response show more complete regrowth. The findings supported the hypothesis that this pattern is a result of alternating immunological reactions in alopecia areata patches.