Please also see petrous apex and jugular foramen DDx
Vestibular Scwhanomma
Q: Why is this term preferred over "acoustic neuroma"
A: The lesion usually involves the vestibular division of CN VIII as opposed to the "cochlear division".
Anatomy:
know what nerve lives in each quadrant of the IAC
http://radiopaedia.org/articles/internal-auditory-canal-nerves-mnemonic
(thanks to David Gorovy '18 for the reference)
Bonus question
Q: Who is Bill's Bar named for?
A: William House father of neurotology. He worked with his brother Howard (who founded the House Institute in Los Angeles (the NYEEI of the west coast))
Meningioma
Epidermoid
Arachnoid Cyst
HSS 608349 (Thanks to Nassima Jafferjee)
Aneurysm
distal AICA or PICA