Teratomas: the tumours that can transform into 'evil twins'

Look away if you're squeamish - our bodies are capable of creating macabre structures when our cells go awry, and this lump of bone, hair and teeth is just one of them Making the weird news last week was Yamini Karanam, who underwent surgery in Los Angeles after being diagnosed with a brain tumour. The benign lump became a sensation when it turned out to be a grotesque growth containing bone, hair and teeth. Known to medical science as a teratoma (from the Greek for "monstrous tumour"), news wir...