According to one of the 72-year-old man's United Kingdom doctors, who wrote about the case in BMJ Case Reports on Monday, his trouble began soon after a successful and seemingly well-done surgery that removed a benign lump from inside his chest.
A patient's false teeth became stuck in his throat in a routine operation, and were not found for eight days.
He was prescribed mouthwash, antibiotics and steroids, and sent home.
But because of the denture debacle, he suffered pain, bleeding and swallowing difficulties, and endured repeated hospital visits, additional invasive tests and blood transfusions.
When the pain intensified, ER doctors noticed "a metallic semicircular object" - with the retired electrician telling them "his dentures had been lost" during surgery eightdays earlier, the report states. He remained in the hospital for another six days.
Two days later he returned with worsening symptoms.More news: The Lion King Remake Is Now The Top Grossing Animated Film
Lead author Harriet Cunniffe, from James Paget Hospital in eastern England, is calling for surgeons to ensure dentures are removed from patients before an operation. He told doctors he hadn't been able to swallow any of his prescribed medicines.
The hospital took another X-ray that revealed the problem: His dentures-a metal roof plate and three false teeth-lodged at the top of this throat, which had caused internal blistering and swelling.
He was hospitalised, though doctors still mistakenly assumed he had developed severe pneumonia, possibly caused by having inhaled food, stomach acid, or saliva into his lungs.
As tests revealed the bleeding had stopped, he was sent home, only to reappear 10 days later with the same problem.
Emergency surgery removed the dentures from the man's throat. They cauterized the tissue to prevent further bleeding.
But six days later a bout of bleeding prompted his return.More news: CHP officer, suspect killed in Riverside gun battle
The man had to have a blood transfusion he lost so much blood.
But the hospital still hadn't seen the last of him.
Over the next six weeks, however, his tissue healed, he did not require any more emergency care, and his blood count returned to normal, according to the August 12 BMJ Case Reports.
The report's authors said there had been other documented cases of dentures being inhaled during anaesthetic.
Keeping people's dentures in is thought to make it easier for anesthesia to be given to them through a bag-mask, but they should obviously be taken out immediately before any intubation starts, the report noted.
The presence of any false teeth or dental plates should be clearly documented before and after any surgical procedure, with all members of the surgical team made aware of what is to be done with them, they add.More news: Iran warns of war if Israeli warships enter Persian Gulf