Figure 1.

Schematic representation of posterior fossa emissary veins in a patient with a hypoplastic sigmoid sinus and internal jugular vein. External connections of emissary veins are indicated by the blue arrows and bold white letters. DCV, deep cervical vein; EJV, external jugular vein; IJV, internal jugular vein; JB, jugular bulb; LCV, lateral condylar vein; MEV, mastoid emissary vein; OEV, occipital emissary vein; PAV, posterior auricular vein; PCV, posterior condylar vein; PSS, petrosquamosal sinus; RMV, retromandibular vein; SOVP, suboccipital venous plexus; SS, sigmoid sinus; SSS, superior sagittal sinus; TS, transverse sinus; VAVP, vertebral artery venous plexus.