Chinese doctors found a football-sized, 33-pound tumor after cutting open a woman who had been complaining of abdominal pain, according to a report from Reuters.

Citing Thursday's Beijing Times, Reuters said surgeons at the Beijing's Chaoyang Dongba hospital spent 30 minutes removing the tumor from 21-year-old Xiao Wen's abdomen. It measured 16 inches by 12 inches and is thought to be benign.

One surgeon said he had not seen a tumor that large in 20 years of medicine. He went on to say that the woman was lucky doctors found the tumor before it spontaneously burst.

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Her family told the newspaper that they hadn't noticed anything wrong with Xiao Wen's stomach because, at 251 pounds, she was already "comparatively fat."