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Updated: Aug 19, 2026

Rapid Genetic Analysis of Epithelial-Mesenchymal Signaling During Hair Regeneration
Published on: February 28, 2013
Short anagen hair with persistent synchronized pattern of scalp hair growth
Keng-Ee Thai1, Rodney D Sinclair
1Department of Medicine-Dermatology, University of Melbourne, St Vincent's Hospital.
Abstract:
Unlike other mammals that molt hair seasonally, human beings have scalp hair follicles that exhibit an asynchronized pattern of cycling, with the growth and subsequent shedding of each hair being independent of others around it. This mosaic cycling behavior is established early and continues throughout life. We describe a boy who continues to have a synchronized pattern of hair growth and shedding, and a short anagen duration at 4 years of age. He appears to never have established the expected asynchronized pattern of hair growth.
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