Surgeon Finds Woman's Embryonic Twin in Her Brain...
A brain surgeon was operating on a 26-year-old wom... ...tremely rare circumstance: an embryonic twin, or " teratoma ," lodged in her brain. The teratoma , complete with hair, teeth and bone, was the myst...
https://www.neatorama.com/2015/04/22/Surgeon-Finds-Womans-Embryonic-Twin-in-Her-Brain/
