Hydrocephalus & CSF Circulation Disorders
An abnormal accumulation of cerebrospinal fluid within the brain ventricles, leading to increased intracranial pressure or ventricular dilation.
What is Hydrocephalus & CSF Circulation Disorders?
Hydrocephalus occurs when there is an imbalance between the production, circulation, and absorption of cerebrospinal fluid (CSF) in the brain. This causes the fluid-filled cavities (ventricles) to enlarge. In infants and children, this may cause rapid head growth, while in adults it causes headaches, gait instability, cognitive changes, and urinary urgency (Normal Pressure Hydrocephalus).
Common Symptoms & Signs
- In adults: Triad of gait disturbance ('magnetic' feet), progressive forgetfulness, and urinary urgency or incontinence
- Persistent morning headaches accompanied by nausea or vomiting
- Visual disturbances (blurred vision, diplopia/double vision, or papilledema)
- In infants: Bulging fontanelle (soft spot), rapid increase in head circumference, and 'sunsetting' eyes
Causes and Risk Factors
- •Congenital aqueductal stenosis or anatomical malformations (e.g. Chiari malformation)
- •Post-infectious meningitis scarring CSF reabsorption pathways
- •Post-hemorrhagic scarring following brain hemorrhage or trauma
- •Mass lesions (tumors or cysts) mechanically blocking ventricular pathways
Diagnostic Procedures & Imaging
When Urgent Medical Evaluation is Required
- •Lethargy, extreme drowsiness, or inability to wake the patient
- •Persistent projectile vomiting
- •Rapidly deteriorating vision or sudden inability to walk
- •High fever with stiff neck and signs of shunt malfunction in a patient with a preexisting shunt
Treatment Modalities
Non-Surgical & Medical
- •Temporary medical reduction of CSF production (rarely definitive, used as a temporary bridge)
- •Addressing underlying systemic or infectious triggers
Surgical Interventions
- •Ventriculoperitoneal (VP) Shunt Placement: Placement of a flexible catheter and pressure-regulating valve that diverts excess CSF into the abdominal cavity
- •Endoscopic Third Ventriculostomy (ETV): A minimally invasive neuroendoscopic procedure creating a natural bypass opening in the floor of the third ventricle, avoiding a foreign body implant
When is Surgery Considered?
Surgical diversion or endoscopic opening is warranted when ventricular enlargement is progressive, symptomatic, or produces elevated intracranial pressure threatening neurological function or vision.
What a Consultation Involves
The specialist consultation includes fine-slice MRI evaluation of the ventricular system to ascertain whether the hydrocephalus is communicating or obstructive, determining whether the patient is an ideal candidate for ETV or a programmable shunt.
Frequently Asked Questions
What is the difference between an ETV and a VP shunt?
An ETV creates an internal natural opening inside the brain ventricles without needing any foreign implant, but requires suitable anatomy (obstructive hydrocephalus). A VP shunt uses a subcutaneous silicone tube with an adjustable valve to drain fluid into the abdomen.
Can someone with a shunt live a normal active life?
Yes. With modern programmable valves and appropriate monitoring, patients attend school, work, and engage in regular exercise with minimal restrictions.
Surgical Interventions for Hydrocephalus & CSF Circulation Disorders
- [1] Idowu OE, Vitowanu JM. Management of Hydrocephalus in Complex Craniospinal Pathologies. 2022.
- [2] Drake JM, et al. Randomized trial of cerebrospinal fluid shunt design in pediatric hydrocephalus. Neurosurgery. 2001.
Discuss This Condition
Have your scans and clinical records evaluated for diagnostic clarity or surgical indication.