In the second procedure, the small cochlear device will be implanted to allow her to hear again in her left ear. The bullet that damaged her skull also destroyed her eardrum and all the bones she needs to hear, the hospital said.
"There are social benefits to that in terms of knowing who's talking to you in a crowded room. And there are obvious safety benefits in knowing where the car is coming from when you're crossing the road," Rosser said.
Yousafzai underwent emergency surgeries while still in Pakistan, and compared to those, her doctors in Birmingham have said these procedures will be less traumatic. They last only three hours, and she will be an outpatient within a week or two, they have predicted. Nine people will perform the surgeries, including two neurosurgeons and a burns and plastics consultant surgeon.
Individually, they are relatively routine. The hospital performs 50 of each procedure every year. But Rosser admitted that it's extremely rare for the hospital to perform both at the same time -- especially on someone who has undergone as much trauma as Yousafzai has.
"Certainly doing the two together in somebody who's already had a facial nerve reconstruction and the other stuff she's had done I think is pretty unique," Rosser said.
He revealed today for the first time that Yousafzai has already undergone surgery in Birmingham to repair her damaged facial nerve. Her face was no longer symmetrical and she could not close her mouth properly, Rosser told ABC News. Post-surgery, her face has at least an 80 percent chance of healing fully in the next 9-18 months.
But Rosser said Yousafzai shows no signs on long-term damage, is able to speak and read and is expected to make a full recovery.
"She's got some difficult times ahead, inevitably," he told ABC News. "But she is as I've said, very, very strong. And I have no doubt she will overcome whatever the challenges are."