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Multiple primary melanomas: analysis of 49 cases

P Savoia1, P Quaglino, A Verrone

  • 1First Dermatologic Clinic, University of Turin, Torino, Italy.

Melanoma Research
|October 9, 1998
PubMed
Summary
This summary is machine-generated.

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Multiple primary melanomas are rare but not a negative prognostic factor. Early detection through close follow-up is crucial for melanoma patients to identify subsequent primary lesions.

Area of Science:

  • Dermatology
  • Oncology
  • Epidemiology

Background:

  • Multiple primary melanomas are uncommon, affecting an estimated 1.75% to 8.5% of melanoma patients.
  • This study investigates the clinical, histological, and epidemiological features of patients with multiple primary melanomas.

Purpose of the Study:

  • To characterize patients with multiple primary melanomas.
  • To assess the prognostic implications of developing multiple melanomas.
  • To emphasize the importance of diligent follow-up for melanoma survivors.

Main Methods:

  • Retrospective analysis of 49 patients with multiple primary melanomas from a cohort of 2470 melanoma patients.
  • Evaluation of clinical, histological, and epidemiological data.
  • Analysis of diagnosis timing, Breslow thickness, patient demographics, and survival rates.

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Main Results:

  • 35 patients had two melanomas, 11 had three, and 3 had four or more.
  • Concurrent diagnosis occurred in 45% of cases; median time to a second melanoma was 22.6 months.
  • Mean Breslow thickness decreased significantly in subsequent melanomas.
  • Multiple melanoma patients were older and had a higher incidence of lentigo maligna melanoma.
  • 5-year survival rate (83%) did not differ significantly from single melanoma patients.

Conclusions:

  • Multiple primary melanomas do not appear to be a negative prognostic indicator.
  • Close follow-up is essential for early detection of subsequent primary melanomas and metastases.
  • Identifying early-stage secondary melanomas can improve patient outcomes.