"White Line on Nails: Hidden Kidney Cancer Risk"
New research from the NIH suggests that faint white lines on fingernails could indicate a rare genetic condition, BAP1 tumor predisposition syndrome, which increases the risk of various cancers, including kidney, skin, and eye cancers. The study found that 88% of people with this genetic disorder had abnormal nail markings, such as a thin white line running the length of the nail, often associated with benign tumors. This condition affects fewer than 100 American families and is linked to more aggressive and early-onset cancers.