Lichenoid dermatitis is characterized by an inflammatory infiltrate parallel to the epidermis in the superficial dermis. This infiltrate sometimes obscures the dermal-epidermal junction. The document provides a table comparing the differential diagnosis of lichenoid dermatitis including features of lichen planus, lichenoid drug reaction, fixed drug eruption, lichen striatus, lichen nitidus, lichenoid keratosis, and lichen sclerosus. It also includes figures showing examples of lichenoid dermatitis, colloid bodies in lichen planus, lichen sclerosus, and fixed drug reaction.