Medicine has come a long way over the years, and it is absolutely mind-blowing. From replacing joints to vaccinations, doctors are learning and performing these amazing procedures daily. Even with the endless hours of studying and practicing, doctors misdiagnose quite frequently. After all, they are human.Â Take what happened to Chilean woman Estela Melendez, who was told by doctors that she was living with a tumor in her stomach. Estela, after tests and countless trips to the doctors, found out the devastating truth about her tumor.