One of the first signs of nail melanoma is a vertical dark brown or black line running vertically on the nail. Other symptoms of nail melanoma include: Skin discoloration, with the skin ...

Michelle Tagliamonte, 58, was getting a manicure when she noticed the black lines on her thumb, which signaled the start of a fast-spreading cancer.

The black lines (left) on Michelle Tagliamonte's thumb were a sign of cancer.

this black line in my nail was coming from inside the growth plate down from inside my nail.” “The melanoma was in the growth plate [in my thumb] down to my first knuckle,” explains Tagliamonte.

A notable case involves Michelle Tagliamonte, a 58-year-old from Ohio, who discovered two black lines on her thumbnail during a manicure, which turned out to be an early sign of melanoma (1 ...