Ungual Spitz Nevus: Description of Dermoscopic Data

Area of Science:

• Dermatology
• Oncology
• Pathology

Background:

• Spitz nevus is a benign melanocytic proliferation.
• It commonly affects children on the face, trunk, or lower extremities.
• Spitz nevi can clinically and microscopically resemble melanoma, posing diagnostic challenges.

Observation:

• A 13-year-old male presented with asymptomatic dark brown melanonychia on his third left fingernail.
• Dermoscopy revealed longitudinal bands (<3 mm wide) of heterogeneous color and a positive Hutchinson's sign.
• This presentation mimicked ungual melanoma.

Findings:

• This is the second reported case of an ungual Spitz nevus.
• The lesion exhibited features typically associated with melanoma, including Hutchinson's sign.
• The benign nature of Spitz nevi requires careful differentiation from malignant melanoma.

Implications:

• This case highlights the diagnostic challenge of Spitz nevi in unusual locations.
• Further research is needed to establish diagnostic and management criteria for ungual Spitz nevi.
• Accurate diagnosis is essential to avoid unnecessary aggressive treatment for benign lesions.