ErnieKey writes: Doctors in China have just successfully performed a groundbreaking surgery on a 3-year-old little girl named Han Han. Han Han was suffering from congenital hydrocephalus which caused her head to grow to four times the normal size. If something wasn't done, she probably wouldn't have lived much longer. This is when surgeons at the Second People's Hospital of Hunan Province elected to remove a large portion of her skull and replace it with a 3d printed titanium mesh skull. The results were truly amazing, and Han Han is expected to make a full recovery.