Alopecia areata

    Clinical Features:

    • Autoimmune disease causing nonscarring alopecia
    • Most common in children and young adults
    • It most often affects the head or beard, resulting in well-circumscribed patches of hair loss.
    • Severe cases may progress to alopecia totalis (loss of all hair on the head) or alopecia universalis (loss of all body hair).

    Histologic Features:

    • Peribulbar and intrabulbar lymphocytic infiltrate ("swarm of bees")
    • Decreased anagen hairs and increased catagen and telogen hairs
    • Increase in follicular stelae with lymphocytic infiltration
    • Increase in miniaturized vellous hairs
    • Pigment incontinence of hair bulbs
    External Links:

     

    Cases associated with this book:

  • Alopecia areata
    Author: Stephen Lyle, M.D., Ph.D.

    Conference: DermatopathologyConsultations.com Teaching Collection