KEY FACTS Terminology Petrous apex (PA) cholesterol granuloma: Expansile PA lesion resulting from foreign-body giant cell reaction to deposition of cholesterol crystals in apical air cells with fibrosis and vascular proliferation a.k.a. cholesterol cyst, "chocolate" cyst You’re Reading a Preview…
KEY FACTS Terminology Mucus-containing, expanded petrous apex (PA) air cells(s) lined by secretory epithelium resulting from chronic ostial obstruction You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are…
KEY FACTS Terminology Definition: Sterile residual fluid collection in petrous apex (PA) air cells, sometimes resulting from remote otomastoiditis a.k.a. PA effusion You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership…
KEY FACTS Terminology Petrous apex (PA) cholesteatoma or epidermoid: PA focus of cholesteatoma due to epithelial rest of embryonal origin You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you…
KEY FACTS Terminology Synonyms: Petrous apex (PA) arachnoid cyst Definition: Congenital or acquired herniation of posterolateral wall of Meckel cave (MC) into PA You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become…
KEY FACTS Terminology Petrous apex (PA) asymmetric marrow: Asymmetric pneumatization of PA with nonpneumatized marrow space in opposite PA simulating mass lesion Synonym: PA pseudolesion You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited…
KEY FACTS You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Blood within normally fluid-filled spaces of labyrinth You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Endolymphatic sac tumor (ELST) Papillary cystadenomatous tumor of ELS Originates from epithelium of ELS You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member.…