Age distribution and histologic patterns of dysplastic nevi

Area of Science:

• Dermatology
• Pathology
• Oncology

Background:

• Dysplastic melanocytic nevi (moles) are precursors to melanoma.
• Understanding the demographic and histopathological features of dysplastic nevi is crucial for early melanoma detection.

Purpose of the Study:

• To analyze the demographic data and histopathological patterns of dysplastic moles.
• To investigate the relationship between dysplastic nevus severity, age, and progression to melanoma.

Main Methods:

• Retrospective review of 676 dysplastic moles from 487 patients.
• Classification of nevi patterns (superficial/acquired vs. deep/congenital).
• Grading of dysplasia severity (mild, moderate, severe) and comparison with melanoma diagnoses.

Main Results:

• Most dysplastic nevi (95%) had an acquired pattern; 5% had a congenital pattern.
• Average age increased with dysplasia severity, from 34.8 years (mild) to 46.9 years (early invasive melanoma).
• Men showed more severe dysplasia, a higher prevalence of truncal lesions, and more regressive changes compared to women.

Conclusions:

• A significant age progression exists from mild dysplasia to invasive melanoma.
• Men with dysplastic nevi present with more aggressive histopathological features and lesion characteristics.
• Truncal lesions are common sites for dysplastic nevi requiring biopsy.