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Related Experiment Videos

Biologic behavior of thin malignant melanomas with regressive changes.

R R Paladugu, R H Yonemoto

    Archives of Surgery (Chicago, Ill. : 1960)
    |January 1, 1983
    PubMed
    Summary

    Thin melanomas (cutaneous malignant melanoma ≤0.76 mm) with regressive features show a higher metastasis rate (45.5%) than those without regression (12%). These findings suggest regressive changes are critical warning signs in thin melanomas.

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    Area of Science:

    • Dermatology
    • Oncology
    • Pathology

    Background:

    • Thin cutaneous malignant melanomas (≤0.76 mm) are generally considered to have a favorable prognosis.
    • Regressive changes in melanocytic lesions can indicate underlying malignancy or altered growth patterns.

    Purpose of the Study:

    • To investigate the metastatic potential of thin cutaneous malignant melanomas, specifically evaluating the impact of regressive features.
    • To determine if conventional prognostic guidelines are adequate for thin melanomas exhibiting regression.

    Main Methods:

    • Retrospective analysis of 36 thin cutaneous malignant melanomas.
    • Classification of lesions based on maximal thickness (<0.76 mm) and presence or absence of regressive features.
    • Tracking of metastasis development over time (2-120 months).

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    Main Results:

    • Eight out of 36 (22.2%) thin melanomas metastasized.
    • Lesions with regressive features had a significantly higher metastasis rate (5/11, 45.5%) compared to lesions without regression (3/25, 12%).
    • Metastasis occurred within 2 to 120 months post-diagnosis.

    Conclusions:

    • Thin melanomas with regressive changes represent a distinct subgroup with a higher propensity for metastasis.
    • Standard prognostic guidelines for thin melanomas may not apply to lesions with regressive features.
    • Regressive changes in thin melanomas should be recognized as critical warning signals requiring careful clinical attention.