Extrafacial lentigo maligna: A progression model and enhanced diagnostic techniques using dermatoscopy and...

Area of Science:

• Dermatology
• Oncology
• Pathology

Background:

• Lentigo maligna (LM) is an intraepidermal melanoma subtype linked to chronic sun exposure.
• Diagnosing LM can be difficult across all stages, necessitating careful clinicopathological correlation.
• Early detection is key, as invasive melanoma poses significant health risks.

Purpose of the Study:

• To review the clinical presentation and diagnostic methods for lentigo maligna.
• To provide insights into diagnosing extrafacial lentigo maligna using case studies.
• To emphasize the importance of distinguishing intraepidermal LM from invasive melanoma.

Main Methods:

• Review of clinical presentation and diagnostic modalities.
• Dermoscopy and confocal microscopy as noninvasive diagnostic tools.
• Presentation of four clinical cases illustrating different stages of lentigo maligna progression.

Main Results:

• Lentigo maligna diagnosis requires integrating clinical, dermoscopic, and histopathological findings.
• Noninvasive methods like dermoscopy and confocal microscopy aid in early and accurate diagnosis.
• Case studies highlight the variability in LM presentation and the importance of a diagnostic model.

Conclusions:

• Accurate diagnosis of lentigo maligna is challenging but crucial for patient outcomes.
• Clinicopathological correlation and noninvasive techniques improve diagnostic accuracy.
• Timely intervention for lentigo maligna prevents progression to invasive melanoma.