Afterwards , Bailey has an idea and shares it with Derek .
When Dr. Bailey ( Chandra Wilson ) and Derek can not find any tumor in Izzie 's brain from the MRI , they decide to map her brain while she hallucinates and they discover an inoperable tumor .
Afterwards , Dr. has an idea and shares it with Derek .
When Dr. Bailey ( Chandra Wilson ) and Derek can not find any tumor in Izzie 's brain from the MRI , they decide to map her brain while she hallucinates and they discover an inoperable tumor .