Surgeons have found and removed an embryonic twin, complete with hair, bone and teeth, from deep in the brain of a PhD computer science student.
![Yamini Karanam was diagnosed with a pineal tumour.](https://www.nzherald.co.nz/resizer/v2/54HCB36O7W7FYHG5UKD4CZMYVY.jpg?auth=342a53ca9f9590f5d0076dbbf14812be8921cc7d5bf1e719253eeeefb38f22e0&width=16&height=9&quality=70&smart=true)
Yamini Karanam, 26, had been experiencing health problems for some time, including trouble with concentrating and reading, and eventually walking.
After seeing a series of neurologists and neurosurgeons across the United States she was diagnosed with a tumour on the pineal gland in her brain.
Karanam, from Hyderabad, India, was studying at a college in Indiana.