Disorders of hair in infants and children other than alopecia

The document discussed various hair disorders in infants and children, excluding alopecia. It covered the embryology and normal development of hair, noting that humans have about 5 million hair follicles, with 100,000 on the scalp. Hypertrichosis was defined as excessive hair growth without an increase in follicle number, while hirsuties was described as androgen-dependent hair growth in postpubertal females. Hypotrichosis was divided into localized and generalized types, with management options including excision or hair transplantation. Structural abnormalities of the hair shaft, trichotillomania (a compulsion to pluck hair), and tinea capitis (fungal infection of the scalp) were also discussed. The conclusion emphasized the importance of educating patients and parents about the etiology, natural history, treatment options, and realistic outcomes of pediatric hair conditions.