Anterior inferior cerebellar artery vascular loop - type II

Case contributed by Dr Heba Abdelmonem


Right trigeminal neuralgia.

Patient Data

Age: 40 years
Gender: Male

An incidental finding of a vascular loop of the right anterior inferior cerebellar artery (AICA) just approaching the entrance of the right internal auditory canal.

Both trigeminal nerves are normal.

Incidental mega cisterna magna.

Case Discussion

Vascular loop of the AICA is classified into 1:

  • type 1: vascular loop within the CPA level
  • type 2: vascular loop proximal to the IAC extends to less than 50% of the canal
  • type 3: vascular loop distal to the IAC extends to more than 50% of the canal
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Case information

rID: 65779
Published: 24th Jan 2019
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included
Institution: Zagazig University Hospital

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