Toes & nailsUrgent
Subungual melanoma — alert
Pigmented band under the nail that may be a serious skin cancer.
Educational information: this article does not replace a medical diagnosis.
When to seek care
This condition requires prompt medical attention.
Key points
Signs to observe
- Subungual melanoma is rare but severe.
- Warning signs (Levit's ABCDEF rule): Age > 50, Brown/Black band > 3 mm, rapid Change, Digit involved (thumb, big toe++), Extension to periungual skin (HUTCHINSON sign, highly suggestive), Family history of melanoma.
Useful steps
- URGENT DERMATOLOGICAL CONSULTATION for any new or evolving pigmented band.
Monitoring and medical advice
- Diagnosis is histological (biopsy).
Relevant ages
Adult · Senior
When to seek care
This condition requires prompt medical attention.