Doctors in China were shocked to find a toothbrush in the intestine of a 64-year-old man who had swallowed it when he was just 12. It stayed there for 52 years without causing any health issues.

In a medical case that has stunned both doctors and readers alike, a 64-year-old man from eastern China’s Anhui province discovered that a toothbrush he had accidentally swallowed as a child had ...