Indian Sanju Bhagat's belly was so bloated that he looked nine months pregnant and could barely breathe when he was taken to the hospital in 1999. Doctors rushed the 36-year-old into surgery, believing that the tummy bulge was a tumor. Instead, they found the mutated body of Bhagat’s twin brother, complete with limbs, hair and even fingernails. As a fetus, Bhagat's twin got trapped inside of his body. By attaching to his blood supply, the twin had survived as a parasite post-birth … for an incredible three-and-a-half decades.
Photo via Timuryn