A man in China has had a 6-metre tapeworm removed from his bottom.
According to a study published in the New England Journal of Medicine, the 38-year-old man went to hospital after three days of "worsening abdominal pain, vomiting, anorexia, generalized weakness, and weight loss".
The patient was given a worming drug called praziquantel, and then a "cathartic" drug, which means a drug that makes you poo. (It's different from a laxative, which just makes it easier to poo.)
Taenia saginata, aka beef tapeworm, spends part of its lifecycle in cows, but to breed it needs to be eaten by a human. Then it lays its eggs in the human gut.
Apparently, when doctors saw the man again three months later, he had no symptoms and was fine.
Happy ending for everyone involved, apart from the tapeworm.