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A lichenoid eruption is a skin disease characterized by damage and infiltration between the epidermis and dermis. [1] Examples include lichen planus, lichen sclerosus and lichen nitidus. It can also be associated with abrasion or drug use. [2]
The term lichenoid reaction (lichenoid eruption or lichenoid lesion) refers to a lesion of similar or identical histopathologic and clinical appearance to lichen planus (i.e., an area which resembles lichen planus, both to the naked eye and under a microscope). [7] [8] Sometimes dental materials or certain medications can cause lichenoid ...
Epidermal changes are less common in lichenoid drug eruptions when compared to classic lichen planus. However, a higher concentration of necrotic keratinocyte and eosinophils in the infiltrate can be helpful in distinguishing lichenoid drug reaction from cutaneous lichen planus.
Contact lichenoid reaction; Contact stomatitis; Corticosteroid-induced contact dermatitis; Cosmetic dermatitis; Cosmetic intolerance syndrome; D.
Pityriasis lichenoides chronica is probably caused by a hypersensitivity reaction to infectious agents such as the Epstein–Barr virus. Other infectious agents include the adenovirus and Parvovirus B19. [4]
Contact lichenoid reaction, lichenoid amalgam reaction, oral mucosal cinnamon reaction [1] Specialty: Dermatology:
Lichen nitidus is a chronic inflammatory disease of unknown cause [1] characterized by 1–2 mm, discrete and uniform, shiny, flat-topped, pale flesh-colored or reddish-brown papules [2] [3] that may appear as hypopigmented against dark skin.
Urticaria is a vascular reaction of the skin characterized by the appearance of wheals, which are firm, elevated swellings of the skin. [105] Angioedema , which can occur alone or with urticaria, is characterized by a well-defined, edematous swelling that involves subcutaneous tissues, abdominal organs, or upper airway.