A large, pigmented nail bed lesion in a child

Area of Science:

• Dermatology
• Pediatric Pathology

Background:

• Nail bed lesions require careful evaluation.
• Pigmented subungual lesions can be challenging to diagnose.

Observation:

• An extremely large junctional nevus was observed.
• The nevus presented with histological atypia.
• The patient was a 6-year-old Japanese child.

Findings:

• The case highlights an unusual presentation of a pediatric subungual pigmented lesion.
• Histological atypia in pediatric nevi warrants thorough assessment.

Implications:

• This case underscores the importance of comprehensive evaluation for subungual pigmented lesions in children.
• Management strategies for these lesions should consider both clinical and histological features.
• Further research into pediatric nail bed nevi is warranted.