👉 Mastoidectomies are surgical procedures that involve removing a portion of the mastoid bone, which is located in the back of the skull. Mastoids are tiny bones that sit on top of the frontal bone and protect the brain from external pressure. When they become damaged or diseased, it can lead to hearing loss, balance problems, and other issues. A mastoidectomy is typically done when a person has had an accident causing damage to the mastoid bone, such as falling off