Global rostral midbrain dysfunction secondary to shunt malfunction in hydrocephalus

Area of Science:

• Neurology
• Neurosurgery
• Pediatric Neurosurgery

Background:

• Congenital hydrocephalus is a condition characterized by excessive cerebrospinal fluid in the brain.
• Shunt malfunction can lead to serious neurological complications.
• Rostral mesencephalic dysfunction presents with a specific set of clinical signs.

Purpose of the Study:

• To describe two cases of congenital hydrocephalus with shunt malfunction.
• To correlate clinical findings with anatomical substrates.
• To propose a mechanism for the observed neurological syndrome.

Main Methods:

• Case report of two patients with congenital hydrocephalus and shunt malfunction.
• Clinical assessment including neurological examination.
• Computed tomography (CT) scans to evaluate ventricular size.
• Review of anatomical substrates and proposed mechanisms.

Main Results:

• Both patients exhibited clinical syndromes suggestive of global rostral mesencephalic dysfunction.
• Symptoms included sylvian aqueduct syndrome, parkinsonian-like state, and quadriparesis.
• CT scans revealed marked dilatation of the lateral and third ventricles.
• Shunt revision resulted in clinical improvement in both cases.

Conclusions:

• Shunt revision is effective in improving neurological deficits associated with hydrocephalus and shunt malfunction.
• Dilatation of the third ventricle and rostral aqueduct can explain the observed clinical syndrome.
• Understanding the anatomical basis is crucial for managing these complex cases.