MCA fenestration

Middle cerebral artery (MCA) fenestration is very rare anatomical variant of the middle cerebral artery, incidentally found during MR or CT angiography. It has an incidence of ~0.6% (range 0.2-1%) 1.

Fenestration is the division of the vessel lumen into two separate and parallel channels which rejoin distally. It usually does not have any clinical significance but an aneurysm may arise from the proximal fenestration end.

It may mimic a dissection.


Neuroanatomy
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Article Information

rID: 25992
Section: Anatomy
Tags: cases, refs
Synonyms or Alternate Spellings:
  • Middle cerebral artery fenestration
  • Fenestration of the MCA
  • Fenestration of the middle cerebral artery

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Cases and Figures

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    Case 1: with ICA aneurysm
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    Case 2: right MCA fenestration
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