A patient is refused to leave hospital in China after claiming medical staff tattooed his backside during surgery.
Sheng Xianhui, 34, of Kunming, southwest China's Yunnan Province, claims two Chinese characters were tattooed on his right buttock.
He claims the tattoo - which translates as 'Stone Disease' - was given to him by staff at Yunnan Stone Disease Hospital after he had gall stones removed.
The hospital has now called police to try to evict Sheng - but he has welcomed the police involvement and asked them to investigate.
"I'm not leaving," he said. "I'm worried that if I go out for even half an hour, the hospital will claim I had the tattoo done outside.
"But even if I wanted a tattoo, I wouldn't want those characters and I wouldn't want it on that part of my body."
He says he knew nothing about the tattoo until his wife, Hu Juan, spotted it when he had a shower at the hospital, a week after the operation.
"After the surgery, I felt my right buttock was painful. However I thought it was a normal reaction after the surgery," he said.
And Hu added: "We came here on a friend's recommendation, but never expected they would engrave characters on my husband's ass."
The hospital denies the mark is a tattoo and says it could have been caused by an allergy to the hospital's bed sheets.