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Regressing nevoid nail melanosis in childhood
I Kikuchi1, S Inoue, E Sakaguchi
1National Leprosarium Kikuchi Keifuen, Kumamoto, Japan.
Dermatology (Basel, Switzerland)
|January 1, 1993
Summary
Nail pigmentation in Japanese children, known as longitudinal melanonychia, typically fades over time and is benign. Biopsy is recommended only if malignant changes are suspected.
Area of Science:
- Dermatology
- Pediatric Dermatology
- Nail Disorders
Background:
- Longitudinal melanonychia (LM) presents as pigmented nail streaks, often a concern in childhood.
- Nevoid conditions causing skin pigmentation vary by ethnicity.
- Distinguishing benign nevi from malignant melanoma is crucial.
Observation:
- Four Japanese children with nail pigmentation (longitudinal melanonychia) were monitored.
- Initial progression in size and pigmentation intensity was observed.
- All cases demonstrated a natural tendency to fade during follow-up.
Findings:
- Childhood longitudinal melanonychia, particularly in Japanese children, appears to follow a benign course.
- The condition showed a significant tendency towards regression over time.
- Published literature supports the generally benign nature of nevoid nail melanosis in childhood.
Implications:
- While generally benign, vigilance for potential malignant changes is necessary.
- Punch biopsy is indicated for suspected malignant transformation for medico-legal reasons.
- Understanding the natural history aids dermatologists in managing pigmented nail streaks in children.