Hello,
My dad had a mandibulectomy with neck dissection as well as jaw replacement done on Jan 23, 2008. Unfortunately, he had circulation problems in his tib/fib so they were unable to use his leg bone to replace bone in his mouth. The took, muscle and tissue from his stomach. Initially, his face was HUGE but throughout the weeks and now (2 1/2 months later) there is no significant difference. His plastic surgeon did a remarkable job. He was split down the chin and you can barely tell. Perhpas, mom and you need to talk with the plastic team to address your concerns.

Blessings.