Health Encyclopedia

Subdural effusion

Definition

A subdural effusion is a collection of pus beneath the outer lining of the brain.

Causes, incidence, and risk factors

A subdural effusion is a rare complication of bacterial meningitis. Subdural effusion is more common in meningitis caused by Haemophilus influenzae and in infants.

Symptoms

Bulging fontanelles
Separated sutures
Increased head circumference
Persistent fever
Vomiting
Seizures
Lethargy
Weakness

Signs and tests

There is often a history of recent bacterial meningitis. Tests include:

Treatment

Surgery to drain the effusion is often necessary. Rarely, a permanent drainage device (shunt) is needed to drain fluid. Antibiotics may need to be given by IV.

Expectations (prognosis)

Full recovery from a subdural effusion is expected. If neurological problems continue, they are generally due to the meningitis, not the effusion. Long-term use of antibiotics is usually necessary.

Complications

Complications from surgery include bleeding, infection, and damage to underlying brain structures, which can result in temporary or permanent neurological problems.

Calling your health care provider

Call your health care provider if your child has recently been treated for meningitis and symptoms persist or if new symptoms develop.

Review Date:10/16/2006
Reviewed By:J.A. Lee, M.D., Assistant Professor of Surgery, Columbia University Medical Center, New York, NY. Review provided by VeriMed Healthcare Network.

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