Lauren Koltcz, 45, from North Royalton, Ohio, noticed a brown line on her left thumbnail, but thought it was caused by a vitamin deficiency. When the brown line became thicker, the mother of two ...

(Gray News) - A brown line on a mother’s fingernail turned out to be a rare form of melanoma, according to the Cleveland Clinic. Lauren Koltcz, 45, said she noticed a brown streak on her ...

(Gray News) - A brown line on a mother’s fingernail turned out to be a rare form of melanoma, according to the Cleveland Clinic. Lauren Koltcz, 45, said she noticed a brown streak on her thumbnail one ...