Chinese schoolgirl finds her Twin Sis on her back at 11

Fetus in fetu, a rare abnormality where an unborn twin hides itself into the
body of dominant twin, came to surface when an 11 years old schoolgirl was admitted in the General Hospital of Armed Police Force in Beijing. The case was highlighted by Professor Baogan Peng of the institute. The incident happen with one in five million but it is the rarest off all as this time fetus emerged from the girl’s back as compared to previous experience when fetus appeared most in abdomen or some time in brain.

Writing in the journal BMJ Case Reports, Prof Peng said: 'Based on physical
examination and imaging findings, a diagnosis of fetus in fetu was made preoperatively.' Prof Peng, who is an expert in spinal surgery, said doctors successfully removed the parasitic twin, despite there being no clear way of separating them.

The young patient also suffered from diastematomyelia, which is a congenital disorder in which the spinal cord is split.

He added that a later analysis also found digestive tract lining in the tissue.