Hydrocephalus

Question 1

Hydrocephalus

Define:

Answer 1

abnormal accumulation of CSF in brain due to obstruction of CSF pathway

Question 2

Hydrocephalus

Name 2 types:

Answer 2

Communicating

Non-comunicating

Question 3

Communicating Hydrocephalus

Answer 3

any disruption of flow after the CSF exited the ventricular system (cistern pathway and subarachnoid)

or

decrease in the circulation form cistern to the venous system (superior longitudinal arachnoid granulation)

• no obstruction of ventricular system
• CSF overproduction – choroid plexus tumour (but rare!)
• impaired CSF reabsorption – SAH, meningitis, ↑venous pressure

Question 4

• Obstructive hydrocephalus –*
• or*
• (non-communicating)*

Answer 4

refers to any disease process that

restricts CSF flow within or from the ventricular system, most common located in cerebral aqueduct

• obstruction within ventricular system (most commonly in cerebral aqueduct)
• causes: Spina bifida, congenital toxoplasmosis, tumour, stroke, head trauma