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  • Title: Venous lesions as a cause of sylvian aqueductal obstruction: case report.
    Author: Giannetti AV, Rodrigues RB, Trivelato FP.
    Journal: Neurosurgery; 2008 May; 62(5):E1167-8; discussion E1168. PubMed ID: 18580787.
    Abstract:
    OBJECTIVE: The cases of two patients who presented with sylvian aqueductal obstruction caused by venous lesions (an ectatic vein and a developmental venous anomaly, which are uncommon causes of obstructive hydrocephalus) are reported. CLINICAL PRESENTATION: A 42-year-old man presented with chronic headache and behavior abnormalities. Magnetic resonance imaging revealed supratentorial ventricular dilation caused by an obstruction of the sylvian aqueduct by a developmental venous anomaly. An 18-year-old man complained of intermittent headaches. The magnetic resonance imaging scan disclosed aqueductal stenosis-type hydrocephalus secondary to an ectatic vein. INTERVENTION: Both patients underwent endoscopic third ventriculostomy and recovered well. During the procedures, the aqueductal obstruction by venous elements could be seen clearly. CONCLUSION: Venous anomalies may cause obstructive hydrocephalus and can be suspected in cases of chronic and intermittent headaches. Endoscopic third ventriculostomy is an effective treatment.
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