Fetus in fetu
One of the world's most bizarre medical conditions, Sanju Bhagat, 36, of Nagpur India, had no idea that his twin was inside him for nearly 4 decades. Sanju, who was once teased in his village for having a stomach as big as a 9-month pregnant woman, was suffering from Fetus in fetu, a rare teratoma containing entire organ systems, or simply interpreted as a fetus growing within its twin.
Sanju's doctor who operated on him in June 1999, got the surprise of his life, when instead of taking out a tumor inside his patient's stomach, pulled out limbs, parts of genitalia and hair. Something like a "half-formed creature that had feet and hands that were very developed. Its fingernails were quite long. "
Not only is this a medical miracle to doctors, but it is a miracle that Sanju survived for almost 4 decades with his condition. Not only because there are less than 90 cases of fetus in fetu, but sometimes the parasitic twin can grow large enough to kill its host twin, which subsequently kills both twins.