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Fitzpatrick's Dermatology in General Medicine, 7e
| Part 2. Disorders Presenting in Skin and Mucous Membranes > Section 4. Inflammatory Disorders Based on T-Cell Reactivity and Dysregulation > |
Chapter 26. Lichen Planus
Sections: Lichen Planus: Introduction,  Historical Aspects, Epidemiology, Etiology and Pathogenesis, Clinical Findings, Prognosis and Clinical Course, Treatment, References.
Topics Discussed: lichen planus.
Excerpt:
"Lichen planus (Greek leichen, "tree
moss"; Latin planus, "flat")
is a unique, common inflammatory disorder that affects the skin,
mucous membranes, nails, and hair. The appearance of lichen planus
and lichen planus–like or lichenoid dermatoses has been
likened to the scurfy, finely furrowed, dry excrescences of the
symbiotic vegetation known as lichen.
Although this morphologic comparison may be antiquated, lichen planus
is a distinctive entity with prototypic "lichenoid" papules
that show distinctive color and morphology, develop in typical locations,
and manifest characteristic patterns of evolution. Microscopic features,
similar to the gross morphology, are distinctive although the microscopic
pattern of inflammation and skin response is shared by several dermatoses.
The term lichenoid reaction is the
histologic description used to capsulize the pathologic characteristics
of skin diseases resembling lichen planus...."
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