Updated

Surgeons have finally got to the bottom of shooting pains a mugging victim felt in her backside — more than four months after she was robbed.

This astonishing X-ray shows the thugs left Ying Shi, 26, with a razor sharp 6-inch blade completely buried in her buttocks.

PHOTOS: Outrageous X-rays

"All I remember of the night was a stabbing pain in my backside," Ying said. "I thought they had just slashed me, I didn't realise the whole blade had gone all the way in."

Doctors in Shanghai, eastern China, were baffled by her complaints of stomach pains — until they sent her for X-rays and found the blade pressing into her bladder.

"I am amazed they missed it the first time around but very relieved that they've found it now," Ying said.

Click here to read more on this story from The Sun.