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Desmoplastic malignant melanoma

H G Skelton1, K J Smith, W B Laskin

  • 1Department of Dermatopathology, Armed Forces Institute of Pathology, Washington, DC 20306-6000, USA.

Journal of the American Academy of Dermatology
|May 1, 1995
PubMed
Summary
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Desmoplastic malignant melanoma (DMM) shows a better prognosis than other melanomas, with a 5-year disease-free survival rate of 61%. Tumor depth and stromal mucin presence are key factors influencing survival in DMM patients.

Area of Science:

  • Oncology
  • Dermatopathology
  • Cancer Research

Background:

  • Desmoplastic malignant melanoma (DMM) is a rare and diagnostically challenging melanoma variant.
  • Limited research exists on DMM, leading to ongoing debate regarding its biological potential.

Purpose of the Study:

  • To compare survival rates of DMM against other malignant melanoma types.
  • To identify clinical and histological factors associated with DMM patient survival.

Main Methods:

  • Histologic and immunohistochemical evaluation of 128 DMM cases from the Armed Forces Institute of Pathology.
  • Correlation of patient follow-up data with histological findings to assess disease-free survival.

Main Results:

  • Tumor location, sex, tumor depth, and stromal mucin presence correlated with survival.

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  • The 5-year disease-free survival rate for all DMM cases was 68%, and 61% for lesions deeper than 4 mm.
  • Immunohistochemical analysis revealed HMB-45 negativity in all DMM lesions.

    • Conclusions:

    • DMM demonstrates a significantly better prognosis than other melanomas, with a 5-year disease-free survival rate of 61% compared to 40-41%.
    • This improved survival may be linked to the neural differentiation observed in DMM tumors.