16 Ventricles and Sinuses

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CNS Ventricles

• interventricular foramen aka foramen of monro

• midbrain: cerebral aquaduct
• pons: 4th
• medulla: 4th

CSF

Choroid Plexus Cysts

• trisomy 18

Hydrocephalus

Communicating Hydrocephalus

Noncommunicating Hydrocephalus

Aqueductal Stenosis

Chiari II and Myelomeningocele

Dandy Walker

Pseudotumor Cerebri

• like HTN of ventricles

Normal pressure hydrocephalus

• Corona radiata: compressed
• different from pseudotumor: nl opening pressure

Hydrocephalus Exercise Vacuo

Sinus

Dural

Cavernous

• nerves innervate eye
• cavernous sinus syndrome: all the structures impacted

• artery inside venous structure: instant fistula. Compression
• Swollen eyes: edema, bulging

AV Malformation

• similar symptoms to other mass

• left: noncontrast
• right: contrast