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Hyperpigmented tinea versicolor

H B Allen, C R Charles, B L Johnson

    Archives of Dermatology
    |August 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Hyperpigmented tinea versicolor lesions show faster skin cell turnover and altered melanosomes. This study reveals increased melanosome size and distribution changes contribute to the brown discoloration in tinea versicolor.

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    Area of Science:

    • Dermatology
    • Mycology
    • Cell Biology

    Background:

    • Tinea versicolor is a superficial fungal infection.
    • Hyperpigmentation is a common clinical manifestation of tinea versicolor.
    • The precise mechanisms underlying hyperpigmentation in tinea versicolor are not fully understood.

    Purpose of the Study:

    • To investigate the histological and ultrastructural changes in hyperpigmented tinea versicolor lesions.
    • To elucidate the role of melanosomes in the pathogenesis of tinea versicolor hyperpigmentation.

    Main Methods:

    • Histological examination of skin biopsy specimens.
    • Electron microscopy to analyze melanosome morphology and distribution.
    • Comparison between lesional and unaffected skin.

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    Main Results:

    • Lesions exhibited increased stratum corneum turnover.
    • Histological findings included acanthosis and perivascular inflammation.
    • Electron microscopy revealed larger, singly distributed melanosomes in lesional skin compared to small, packaged melanosomes in unaffected skin.

    Conclusions:

    • Increased melanosome size and altered epidermal distribution are key factors in the brown hyperpigmentation of tinea versicolor.
    • These ultrastructural changes contribute significantly to the clinical presentation of the fungal infection.