False is looks like alopecia areata alopecia areata, alopecia areata but not really. It and similar manifestations of alopecia areata, inadvertently appeared on the scalp 1~2 round, oval or irregular patch of hair loss areas and boundaries clear, you can gradually expand and fusion, no pustules, crusts on the scalp, skin rash, and no symptoms.
Age at onset: pseudo-alopecia areata occurs in middle-aged men, and alopecia areata occurs in 5~40sui, no significant gender differences.
Trend: pseudo pelade stop after a few months to a few years, it generally does not become alopecia areata, but hair loss is not reversible. Alopecia areata can also develop perfect bald or even alopecia universal, but most patients can recover within 6 months.
Hair loss features: false hair loss scalp surface smooth and shiny, atrophy, such as tissue paper, slightly sunken, hair follicles are not clear, not loose fringe of hair loss hair. Alopecia areata is a local scalp look normal, not shrinking, clear hair follicles and hair loss scalp on the edge of loose, easy to pull off.
Histopathology: pseudo pelade of early inflammation around hair follicles clear, advanced dermal fibrosis, hair follicles and sebaceous glands are disappearing. Early stunting of growth stage of alopecia areata hair, advanced hair follicle area is narrow, the sebaceous glands without any change.
Pathogenesis: pseudo pelade probably an unknown disease, and may also be secondary to cause atrophic scarring of the scalp skin. Alopecia areata are mainly advanced neural dysfunction of the brain, resulting in independent (plant) caused by nerve dysfunction, autoimmune, endocrine disorders, intestinal parasite infection.