Blue nevus and "malignant blue nevus:" A concise review

Area of Science:

• Dermatopathology
• Oncology

Background:

• Blue nevi represent a diverse group of melanocytic lesions.
• Clinicopathological classification of blue nevi can be challenging due to overlapping features among subtypes.

Purpose of the Study:

• To review the clinical and histopathological characteristics of various blue nevi.
• To discuss the differential diagnosis of common blue nevi, cellular blue nevi, blue nevi with atypical features, and malignant lesions resembling blue nevi.

Main Methods:

• Literature review of clinicopathological features of blue nevi.
• Discussion of diagnostic criteria for blue nevi subtypes.

Main Results:

• Blue nevi exhibit heterogeneous clinicopathological presentations.
• Overlap exists between different blue nevi subtypes, complicating classification.
• A spectrum exists from benign blue nevi to malignant lesions with blue nevus features.

Conclusions:

• Accurate classification of blue nevi requires careful evaluation of both clinical and histopathological findings.
• Distinguishing benign blue nevi from atypical or malignant variants is crucial for patient management.