Five-second finger test that can tell if you’ve got CANCER

A simple, five-second finger test called the Schamroth window test, or ‘diamond test,’ could help detect finger clubbing, which experts warn may be an early sign of lung cancer. A simple, five-second finger test called the Schamroth window test, or ‘diamond test,’ could help detect finger clubbing, which experts warn may be an early sign of lung cancer.