Cavernous Sinus Thrombosis By Richard C Allen, MD, PhD, Baylor College of Medicine Reviewed / Revised Oct 2022 View Patient Education Etiology Pathophysiology Symptoms and Signs Diagnosis Prognosis Treatment More Information Cavernous sinus thrombosis is a very rare, typically septic thrombosis of the cavernous sinus, usually caused by nasal furuncles or bacterial sinusitis.