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Desmoplastic malignant melanoma: a report on two additional cases

Q J Valensi

    Cancer
    |January 1, 1977
    PubMed
    Summary

    Desmoplastic malignant melanoma (DMM) is rare. This study describes two new cases, highlighting their amelanotic recurrences and confirming DMM

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    Desmoplastic malignant melanoma: A light and electron microscopic study of two cases.

    Cancer·1979

    Area of Science:

    • Dermatology
    • Oncology
    • Pathology

    Background:

    • Desmoplastic malignant melanoma (DMM) is a rare subtype of melanoma.
    • It is characterized by a prominent desmoplastic stromal reaction.
    • Limited case reports exist, necessitating further clinical and pathological documentation.

    Observation:

    • Two new cases of desmoplastic malignant melanoma are presented, increasing the global reported total to nine.
    • The first case originated in a lentigo maligna melanoma, with local recurrence seeding from the primary lesion.
    • The second case arose in a congenital nevus, exhibiting both desmoplastic and epithelioid/spindle cell histology in recurrence.

    Findings:

    • Primary lesions were pigmented, while the desmoplastic recurrences were amelanotic (lacking pigment).
    • The study confirms previously described clinico-pathologic features of DMM.
    • Light microscopy suggests the desmoplastic reaction is a response to a highly invasive spindle cell melanoma component.

    Implications:

    • Amelanotic recurrences in DMM pose diagnostic challenges.
    • Understanding the desmoplastic reaction's origin is crucial for melanoma research.
    • These cases contribute to the limited literature on this rare melanoma variant.

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