Cerebellopontine Angle (CPA) Cistern

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