1. Health
You can opt-out at any time. Please refer to our privacy policy for contact information.

Subungual Melanoma


Updated July 03, 2014


Subungual melanoma is a specific type of melanoma that occurs under the nail bed more commonly in dark-skinned people. Subungual melanoma causes a dark colored stripe that runs along the length of the nail plate , not across the nail. Just having a dark nail stripe is not necessarily melanoma. The following Signs make it more likely that a dark stripe is a subungual melanoma and should be evaluated by a dermatologist:

  • Hutchinson's Sign - Spread of pigmentation into the nail folds
  • Pigmentation in a single digit
  • Occurs at age 50 or older
  • Occurs in the thumb, index finger, or great toe
  • Blurred borders
  • History of melanoma


Pronunciation: sub-UN-gwul mel-uh-NO-muh • (noun)

  1. About.com
  2. Health
  3. Dermatology
  4. Dermatology Basics
  5. Glossary
  6. S
  7. Subungual Melanoma

©2014 About.com. All rights reserved.

We comply with the HONcode standard
for trustworthy health
information: verify here.