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Melanonychia (Nail Pigmentation)

Brown-black streak formation on the nail; may have benign or malignant causes.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Dermatoloji department. Book Appointment →

What is Melanonychia (Nail Pigmentation)?

Melanonychia is a longitudinal brown-black band or diffuse color change occurring on the nail due to melanin accumulation. It may be physiological, inflammatory, drug-related, benign melanocytic, or malignant.

It should be evaluated for subungual melanoma using ABCDEF criteria. Hutchinson's sign is a warning for malignancy.

Dermoscopy and, if necessary, matrix biopsy are used in diagnosis.

Symptoms

Longitudinal brown-black streak on the nail
Pigment that widens or darkens over time
Spread to surrounding skin (Hutchinson's sign)
Surface changes on the nail
Suddenly developing pigmentation on a single nail

Risk Factors

Advanced age
Dark skin color (multiple benign melanonychia)
Trauma history
Some drugs (hydroxyurea, minocycline)
Family history

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • If there is a wide, rapidly growing band on a single nail
  • If Hutchinson's sign develops
  • If there is irregularity in pigmentation
  • If late-onset melanonychia appears

Treatment Methods

01
Dermoscopic examination
02
Matrix biopsy
03
Exclusion of subungual melanoma
04
Treatment of underlying cause
05
Surgical excision if necessary
06
Regular follow-up

Which Department to Visit?

You can visit our Dermatoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

Learn About Dermatoloji Department

Let us help you

You can make an appointment with our specialists or contact us for your concerns.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.