When Igor Namyatov of Russia was growing up, he would complain of pains in his back. Doctors determined that it was only a harmless fatty tumor, and did nothing about it. When the pains returned twenty years later, doctors operated immediately - and found the fetus of his dead twin brother embedded in his back. The embryo apparently had tiny feet and legs. Namyatov refused to leave it at the hospital for further study.

-MosNews (picture): "Alien" Embryo Removed From 35-Year-Old Man’s Back