Seven-point checklist of dermoscopy revisited

Area of Science:

• Dermatology
• Oncology
• Medical Imaging

Background:

• Established dermoscopic algorithms for melanoma diagnosis are over a decade old.
• These algorithms were primarily validated on clear-cut melanomas and benign nevi.

Purpose of the Study:

• To evaluate the diagnostic performance of pattern analysis and the seven-point checklist in contemporary clinical scenarios.
• To compare standard and revised seven-point checklists with a lower threshold for excision.

Main Methods:

• Eight dermatologists assessed 300 dermoscopic images (100 melanomas, 100 excised nevi, 100 monitored nevi).
• Lesions were evaluated using pattern analysis and the seven-point checklist (standard and revised thresholds).

Main Results:

• Pattern analysis correctly identified 82% of melanomas and 87.5% of monitored nevi.
• The revised seven-point checklist recommended excision for 87.8% of melanomas, compared to 77.9% with the standard threshold.
• The revised checklist led to more excisions of benign nevi (72.0%) than the standard (60.3%).

Conclusions:

• Current diagnostic approaches for nevi and melanoma require adaptation to modern clinical practice.
• A revised seven-point checklist with a lower excision threshold enhances diagnostic sensitivity for melanoma.