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Foot pigmentation in Blacks.

A L Freinkel, J J Rippey

    South African Medical Journal = Suid-Afrikaanse Tydskrif Vir Geneeskunde
    |December 25, 1976
    PubMed
    Summary

    Postmortem examination of Black patients revealed foot sole pigmentation in 57% and distinct black spots in 6%. These findings suggest that while foot sole pigmentation is common, not all black spots indicate nevi, though they may relate to melanoma risk.

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    Area of Science:

    • Dermatology
    • Pathology
    • Forensic Medicine

    Background:

    • Foot sole pigmentation is observed in individuals with darker skin tones.
    • The nature and significance of these pigmented lesions require further investigation.

    Purpose of the Study:

    • To investigate the prevalence and histological characteristics of foot sole pigmentation in Black patients.
    • To differentiate between benign pigmentation and potentially pre-malignant lesions.

    Main Methods:

    • Postmortem examination of 70 Black patients.
    • Macroscopic and microscopic analysis of foot sole pigmentation.

    Main Results:

    • 57% of patients exhibited some degree of foot sole pigmentation (grade II).
    • 6% showed focal areas of dense black pigmentation (grade III).
    • Microscopic examination revealed increased melanin and minor melanocytic proliferation, with no true nevi identified.

    Conclusions:

    • Foot sole pigmentation is a common finding in Black individuals.
    • The observed black spots are primarily due to melanin increases and melanocytic proliferation, not true nevi.
    • While these pigmented lesions may be associated with malignant melanoma risk, they are not exclusively nevi.

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