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October 7, 2026

The simple finger test that could flag lung cancer risk

A quick test using only your two index fingers could reveal a little-known warning sign linked to lung cancer and several other serious conditions. Emma Norton, an oncology nurse advisor based in the United Kingdom, says most people have never heard of finger clubbing — or the simple Schamroth window test used to detect it. Here is what the test involves and what your nails may be telling you about your health.

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