Dept. of Dermatology - University of Iowa College of Medicine

A lichenoid tissue reaction implies:

1. A band-like lymphocytic infiltrate in the upper dermis, that parallels the undersurface of the epidermis - suggesting but distinct from epidermotropism.
   AND MAY INCLUDE

2. Basal cell layer degeneration ( hydropic or liquifactive changes ).

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October, 1995