Causes of<unk> cicatricial alopecia can be separated based on focal or diffuse hair loss: Diffuse: * Androgenetic alopecia: androgenic DHT leads to catagenic miniaturization of hair follicles. * Diffuse alopecia areata: diffuse autoimmune destruction of hair follicles * Alopecia totalis: unknown but thought to be autoimmune * Telogen effluvium: emotional or physiologic stress * Anagen effluvium: cancer treatments such as radiation and alkylating agents * Dermatopathia pigmentosa reticularis: genetic autosomal dominant condition Focal: * Alopecia areata: autoimmune destruction of hair follicles * Tinea capitis: fungal infection * Traction alopecia: pulling force applied to hair * Trichotillomania (Trichotillosis)
Non scarring hair loss
Scarring hair loss
Pattern hair loss
Prepubertal hypertrichosis
Generalized lentiginosis
Auricular hypertrichosis
Hypertrichosis
Premature greying of hair