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Related Experiment Videos

Third ventricular choroid plexus arteriovenous malformation simulating a colloid cyst. Case report

R H Britt, G D Silverberg, D R Enzmann

    Journal of Neurosurgery
    |February 1, 1980
    PubMed
    Summary

    A rare cystic arteriovenous malformation in the third ventricle mimicked a colloid cyst on CT scans. Histological examination confirmed the arteriovenous malformation, highlighting its atypical presentation due to hemosiderin deposition.

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    Neurology·2002

    Area of Science:

    • Neurology
    • Neurosurgery
    • Radiology

    Background:

    • Arteriovenous malformations (AVMs) are abnormal tangles of blood vessels.
    • Cystic encapsulated AVMs in the third ventricle are exceptionally rare.
    • Accurate diagnosis is crucial for appropriate management.

    Observation:

    • A case presented with a lesion in the third ventricle.
    • Computerized tomography (CT) scan suggested a colloid cyst due to location.
    • The lesion showed atypical non-homogeneity before and after contrast infusion.

    Findings:

    • The CT scan's increased density on unenhanced scans was attributed to hemosiderin pigment.
    • Hemosiderin resulted from prior hemorrhage within the AVM's capsule wall.
    • Histological examination provided the definitive diagnosis of cystic encapsulated arteriovenous malformation.

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    Implications:

    • This case underscores the importance of considering AVMs in the differential diagnosis of third ventricular lesions.
    • Atypical imaging findings on CT should prompt further investigation.
    • Histopathology remains the gold standard for diagnosing complex neurovascular lesions.