Question: A 68 year old male with poorly controlled diabetes mellitus is evaluated for otorrhea, ataxia, and altered mental status. His fever curve suggests marked variation with periodic very high fever. CT venogram demonstrates a left sided sigmoid sinus thrombosis and opacified mastoid with destruction of septae. Progression to involve which structure would place him at risk for increased intracranial pressure and hydrocephalus?

A) Mastoid emissary vein

B) Transverse sinus

C) Internal jugular vein

D) Torcula

[Answer will be posted with next week's new question]

Answer to last week's question, “Does It Fit" (September 29, 2019)