In about two-thirds of people with nail melanoma, the main symptom is longitudinal melanonychia, a dark vertical streak or line under the nail plate. It may be thin or thick, and light brown to black.

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.

She immediately told her customer that the dark line was likely a symptom ofmelanoma. Subungual melanoma (aka nail melanoma) ...

For Black people, surviving skin cancer begins with knowing what to look for—and where. Hint: It often shows up where the sun ...