Open AccessConcentric polycyclic regrowth pattern in alopecia areata
Author(s) -
Lílian Mathias Delorenze,
Maria Fernanada Reis Gavazzoni-Dias,
Marcelo Souza Teixeira,
Márcia Kalil Aidé
Publication year - 2016
Publication title -
international journal of trichology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.494
H-Index - 22
eISSN - 0974-9241
pISSN - 0974-7753
DOI - 10.4103/0974-7753.179397
Subject(s) - alopecia areata , hair loss , scalp , dermatology , concentric , medicine , mathematics , geometry
Alopecia areata (AA) is a common form of autoimmune nonscarring hair loss of scalp and/or body. Atypical hair regrowth in AA is considered a rare phenomenon. It includes atypical pattern of hair growth (sudden graying, perinevoid alopecia, Renbok phenomenon, castling phenomenon, and concentric or targetoid regrowth) and atypical dark color hair regrowth. We report a case of AA that resulted in a concentric targetoid hair regrowth and discuss the possible related theories regarding the significance of this phenomenon.