Michele Marie Gandolfi

Dec 4, 2024 | scirp.org | Sarah Clarke |Michele Marie Gandolfi

1. IntroductionCholesteatoma, or more specifically acquired cholesteatoma, is a well-known cystic lesion of the ear caused by either perforation or eustachian tube dysfunction that seeds epithelium into the middle ear and mastoid [1]. Bony erosion is usually confined to the ossicular chain and scutum at least initially but over time can cause erosion of the otic capsule, fallopian canal and tegmen. Tegmen erosion often leads to cephalocele or cerebral spinal fluid (CSF) leak.

Sep 4, 2024 | scirp.org | Malini Nair |Nuwan T. Meegalla |Michele Marie Gandolfi

1. IntroductionMeningiomas are the second most common intracranial tumors and make up 15% - 20% of all primary brain tumors [1]. However, meningiomas of the middle fossa floor that extend into the middle ear are exceedingly rare [1]. These are extracranial meningiomas and make up about 1% - 2% of all meningiomas [2]. They often have extension secondary to the primary intracranial tumors and accompany osteolytic change of the skull [3]-[5].