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Alopecia areata Trichotillomania 1. Sparse infiltrate sometimes of lymphocytes around venules of the superficial and deep plexuses 1. Practically no infiltrate of inflammatory cells 2. In early lesions, infiltrate of lymphocytes in the vicinity immediate of follicular papillae, in fibrous sheaths that surround follicular bulbs, and in fibrous tracks that form normally in catagen 2. […]