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Related Experiment Videos

Hypervascular intracisternal acoustic neuroma.

F Bonneville1, F Cattin, A Czorny

  • 1Department of Neuroradiology, Hospital of the University of Pennsylvania, Philadelphia, USA. fabbone1@hotmail.com

Journal of Neuroradiology = Journal De Neuroradiologie
|September 26, 2002
PubMed
Summary

Acoustic neuromas are rarely highly vascular, posing diagnostic challenges. This case highlights a rare, hypervascular acoustic neuroma without typical hearing loss, emphasizing the need for careful differential diagnosis.

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Area of Science:

  • Neuro-oncology
  • Diagnostic Imaging
  • Neurosurgery

Background:

  • Acoustic neuroma diagnosis typically relies on identifying enhancing lesions in the internal auditory canal/cerebellopontine angle on MRI, often with a history of hearing disturbance.
  • Hypervascularity, a sign of malignancy, is exceptionally rare in benign acoustic neuromas.

Observation:

  • We report a unique case of a highly vascular acoustic neuroma presenting without hearing disturbance.
  • The lesion lacked the typical internal auditory canal component, complicating preoperative diagnosis.
  • The tumor exhibited significant hypervascularity with arteriovenous shunting.

Findings:

  • This case demonstrates that acoustic neuromas can be highly vascular and present atypically, without the classic symptoms or MRI findings.

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  • The intracisternal origin and pronounced hypervascularity challenged the initial diagnostic assumptions.

    • Implications:

    • The findings necessitate broadening the differential diagnosis for hypervascular lesions in the cerebellopontine angle, even in the absence of hearing loss.
    • Advanced imaging and careful consideration of rare presentations are crucial for accurate preoperative diagnosis and management of acoustic neuromas.
    • This case underscores the importance of considering acoustic neuroma in the differential diagnosis of atypical, hypervascular tumors.