article_snippet.sent: Surgeons operating to extract what they believed to be a tumour in her brain, were shocked to discover the growth was in fact an embryonic twin, complete with bone, hair and teeth.
article_snippet.sent: And in some cases some cases have been found to resemble a foetus.
article_snippet.sent: But surgeons operating on the 26-year-old discovered the growth, indicated just above the red dot above, was in fact a teratoma - a growth containing bone, hair and teeth .
article_snippet.sent: They have been reported to contain hair, teeth, bone and rarely more complex organs including eyes, hands, feet and limbs.
highlights_snippet.sent: Surgeons operating to extract the growth made a startling discovery .
  
highlights_snippet.sent: Surgeons found a teratoma - an embryonic twin with bone, hair and teeth .
  