Background:Kenogen indicates the physiological interval of the hair cycle in which the hair follicle remains empty after the telogen hair has been extruded a nd before a new anagen hair emerges. Kenogen frequency and ...Background:Kenogen indicates the physiological interval of the hair cycle in which the hair follicle remains empty after the telogen hair has been extruded a nd before a new anagen hair emerges. Kenogen frequency and duration are greater in men and women with androgenetic alopecia (AGA). Objective:To study the relat ionship of kenogen with female AGA. Methods:A woman with AGA, studied 14 years before, was re-examined for 2 years by the phototrichogram technique. Kenogen w as identified when telogen lasted 3 months and shedding left the follicle empty. Results:Kenogen lasted 1-5 months, the longest duration affecting cycles of v ellus hairs, and involved more hair follicles (16 vs. 8%) than in the first obs ervation. Cycles of vellus hairs increased in number from 4 to 13%, and cycles with a normal succession of phases decreased from 60 to 32%. Conclusions:The n umber of kenogen phases increased in parallel with vellus hairs and the diminish ed number of normal hair cycles, features that mark AGA aggravation. Kenogen see ms to be related also to the progression of female AGA.展开更多
文摘Background:Kenogen indicates the physiological interval of the hair cycle in which the hair follicle remains empty after the telogen hair has been extruded a nd before a new anagen hair emerges. Kenogen frequency and duration are greater in men and women with androgenetic alopecia (AGA). Objective:To study the relat ionship of kenogen with female AGA. Methods:A woman with AGA, studied 14 years before, was re-examined for 2 years by the phototrichogram technique. Kenogen w as identified when telogen lasted 3 months and shedding left the follicle empty. Results:Kenogen lasted 1-5 months, the longest duration affecting cycles of v ellus hairs, and involved more hair follicles (16 vs. 8%) than in the first obs ervation. Cycles of vellus hairs increased in number from 4 to 13%, and cycles with a normal succession of phases decreased from 60 to 32%. Conclusions:The n umber of kenogen phases increased in parallel with vellus hairs and the diminish ed number of normal hair cycles, features that mark AGA aggravation. Kenogen see ms to be related also to the progression of female AGA.
