Discoid Lupus Erythematosus
Follicular Degeneration Syndrome (Sometimes Called Central Centrifugal
Dissecting Cellulitis of the Scalp (Perifolliculitis Capitis Abscedens et Suffodiens)
■ Terminal hair: Hair shaft measuring >0.03 mm in diameter, with a diameter greater than that of its inner root sheath.
■ Vellus hair: Hair shaft measuring <0.03 mm in diameter. The thickness of a vellus hair shaft is less than or equal to the thickness of its inner root sheath. Vellus bulbs are usually found high in the dermis.
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