Lichenification: Definition from Answers.com

Lichenification is epidermal thickening characterized by visible and palpable thickening of the skin with accentuated skin markings, and is the hallmark of chronic eczematous dermatitis.^[1]

References

^ Marks, James G; Miller, Jeffery (2006). Lookingbill and Marks' Principles of Dermatology (4th ed.). Elsevier Inc. Page 23, 28. ISBN 1-4160-3185-5.

Clinical and histological nomenclature for skin lesions

Macroscopic

Primary lesions	flat (Macule, Patch) · elevated (Papule, Nodule, Plaque) · fluid (Vesicle, Bulla) · Pustule · Wheal · Ulcer · Erosion · Telangiectasia · Burrow

Secondary lesions	Scale · Crust · Lichenification · Excoriation · Induration · Atrophy

Microscopic

Hyperkeratosis · Parakeratosis · Hypergranulosis · Acanthosis · Papillomatosis · Dyskeratosis · Acantholysis · Spongiosis · Hydropic swelling · Exocytosis · Vacuolization · Erosion · Ulceration · Lentiginous

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Lichenification

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References