The mastoid bone is a bone located behind the ear (felt as a hard bump behind the ear). Inside it looks like a honeycomb, with the spaces filled with air. These air cells are connected to the middle ear through an air filled cavity called the mastoid antrum. Mastoid process
A mastoidectomy is a surgical procedure designed to remove infection or growths in the bone behind the ear (mastoid bone). Its purpose is to create a "safe" ear and prevent further damage to the hearing apparatus.
Picture of Mastoidectomy showing a large cholesteatoma in the mastoid antrum .
A meatoplasty has been performed to enlarge the external auditory canal and allow easy access to the mastoid bowl for inspection and cleaning. The reconstructed eardrum is seen anteriorly.
Left Canal Wall Down Mastoidectomy. This patient had a modified radical mastoidectomy with tympanoplasty. The posterior bony canal has been removed and part of the dry "mastoid bowl" is visible posterior and superior to the reconstructed tympanic membrane.