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Cornoid lamellation. A histologic reaction pattern

T R Wade, A B Ackerman

    The American Journal of Dermatopathology
    |January 1, 1980
    PubMed
    Summary
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    Cornoid lamellation, a key histologic marker for porokeratosis, is also present in other skin conditions. This finding suggests it represents a general reaction pattern of abnormal epidermal cell cornification.

    Area of Science:

    • Dermatopathology
    • Histology
    • Epidermal Biology

    Background:

    • Cornoid lamellation is a recognized histologic feature of porokeratosis.
    • This feature was traditionally considered pathognomonic and exclusive to porokeratosis variants.

    Purpose of the Study:

    • To investigate the diagnostic specificity of cornoid lamellation.
    • To determine if cornoid lamellation occurs in conditions other than porokeratosis.

    Main Methods:

    • Histologic examination of skin biopsy specimens.
    • Comparative analysis of cornoid lamellation in various dermatologic conditions.

    Main Results:

    • Cornoid lamellation was identified in porokeratosis.
    • The study also found cornoid lamellation in several other distinct skin conditions.

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  • This indicates cornoid lamellation is not exclusive to porokeratosis.

    • Conclusions:

    • Cornoid lamellation is a histologic reaction pattern, not a specific marker for porokeratosis alone.
    • It reflects a disordered progression of epidermal cells during cornification.
    • This finding broadens the differential diagnosis for lesions exhibiting cornoid lamellation.