Use the Alphabet of Nail melanoma To help identify Subungual Melanoma (SM)
Age range 20-90 years. African American, Native American, or Asian.
Band of Brown or Black pigment in nail OR Breadth of >3mm OR Border that is irregular/blurred.
Change in size or growth rate of nail band OR lack of change in irregular nail despite treatment.
Digit involved (nail melanoma is most common in the thumb>big toe>index finger). Pigmented band on a single digit is more suspicious than on multiple digits.
Extension of brown or black pigment to the side or base of the nail.
Family or personal history of melanoma or irregular moles.