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Clinically recognized dysplastic nevi. A central risk factor for cutaneous melanoma
M A Tucker1, A Halpern, E A Holly
1Genetic Epidemiology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Md, 20892-7372, USA. tuckerp@epndce.nci.nih.gov
JAMA
|May 14, 1997
Summary
The number and type of moles significantly impact melanoma risk. Clinically dysplastic nevi, in particular, confer substantial risk, enabling identification of high-risk individuals for early intervention.
Area of Science:
- Dermatology
- Oncology
- Epidemiology
Background:
- Melanoma is a significant public health concern.
- Nevi (moles) are common skin lesions, and their relationship to melanoma development requires further elucidation.
Purpose of the Study:
- To investigate the association between the quantity and characteristics of nevi and the incidence of melanoma.
- To identify specific nevus types and counts that indicate elevated melanoma risk.
Main Methods:
- A case-control study was conducted involving 716 melanoma patients and 1014 controls.
- Data collection included interviews, full skin examinations, and photography/biopsy of atypical nevi.
Main Results:
- Melanoma risk correlates strongly with the number of small nevi, large non-dysplastic nevi, and clinically dysplastic nevi.
- One clinically dysplastic nevus increased melanoma risk twofold, while ten or more increased it twelvefold.
- Congenital nevi did not show an association with increased melanoma risk.
Conclusions:
- Clinically dysplastic nevi represent a substantial risk factor for melanoma development.
- Nondysplastic nevi confer a smaller risk, but their quantity is still relevant.
- Nevus characteristics can aid clinicians in identifying individuals at high risk for melanoma, facilitating targeted screening and prevention strategies.