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Mom credits TikTok video for life-saving cancer diagnosis after strange nail marking
Ohio teacher discovered rare melanoma after warning from social media
Lauren Koltcz, 45, of North Royalton, Ohio, noticed a brown line on her left thumbnail, but thought it was caused by a vitamin deficiency. (SWNS)
Koltcz, pictured here, was diagnosed with subungual melanoma, a skin cancer that develops under the nail. (SWNS)
Koltcz watched a TikTok video from a dermatologist warning that brown lines on the nail should be checked by a doctor. (SWNS)
