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Agminated blue nevus - Case report.

Alice Paixão Lisboa¹, Keline Jácome Silvestre¹, Renata Leite Pedreira¹

¹Universidade do Estado do Rio de Janeiro (UERJ) - Rio de Janeiro (RJ), Brazil.

Anais Brasileiros De Dermatologia

|November 10, 2016

Summary

This summary is machine-generated.

Multiple blue nevi, a type of benign skin growth, can appear grouped together. This case report details a patient with multiple agminated blue nevi, confirmed by dermoscopy and pathology.

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Area of Science:

Dermatology
Pathology
Oncology

Background:

Blue nevi are benign melanocytic neoplasms originating from aberrant melanocyte migration during embryonic development.
These lesions are typically found in the reticular dermis and are characterized by their blue-black or blue-gray pigmentation.
While often solitary, blue nevi can present as multiple or agminated lesions, posing diagnostic challenges.

Observation:

A patient presented with multiple, small (1-3 mm) bluish macules clustered on the left upper back.
The lesions were asymptomatic and exhibited a well-defined, grouped (agminated) pattern.
Clinical examination revealed flat to slightly raised macules.

Findings:

Dermoscopic evaluation showed features characteristic of blue nevi, including homogeneous blue-gray pigmentation and atypical vascular patterns.
Histopathological examination of biopsied lesions confirmed the diagnosis of blue nevus, with atypical melanocytes situated in the deep dermis.
The findings supported the classification of the presentation as multiple agminated blue nevi.

Implications:

This case highlights the importance of recognizing the agminated variant of blue nevus, which can mimic other pigmented lesions.
Accurate diagnosis through dermoscopy and histopathology is crucial for differentiating benign blue nevi from potentially malignant melanomas.
Understanding the presentation of multiple blue nevi aids in patient counseling and management, reassuring patients about the benign nature of these lesions.