
A 32-year-old man in China sought treatment for stomach pain and underwent surgery at Wenzhou Medical University Hospital. Doctors discovered a mercury thermometer lodged in his duodenum that he had accidentally swallowed at age 12. He had hidden the incident from his parents for two decades. The thermometer's tip pressed against his intestinal wall, risking internal bleeding. Surgeons successfully removed it intact in 20 minutes without mercury leakage.