Los Angeles: In a shocking discovery, doctors in the US have found an embryonic twin complete with bone, hair and teeth in the brain of a 26-year-old Indian woman undergoing surgery for a suspected tumour.

Yamini Karanam, a PHD student at Indiana University, sought medical help last September after she started having trouble reading and talking. At one point Karanam, from Hyderabad, could barely eat and pain ran from her head throughout her body.