Spoke wheel sign (meningioma)

The spoke wheel sign refers to the pattern of vessels coursing through meningiomas, when seen in cross-section.  It is the result of the same phenomenon which results in the sunburst pattern (vessels seen from the side rather than in cross-section).

A similar appearance also referred to as a spoke wheel sign may also be seen in renal tumours (e.g. oncocytoma) - see spoke wheel vascularity - kidney.

The vascular supply of meningiomas is often both dural and pial. Pial branches usually supply the innermost part of the tumour but arterial feeders to the pedicle at the site of dural attachment and centre of the lesion typically arise from branches of the external carotid artery and in particular the middle meningeal artery.

The feeder arterial branches diverge radially into the lesion; this gives the appearance of a spoke wheel on T2-weighted or post contrast images, or during angiography.

Share article

Article information

rID: 42226
Section: Signs
Synonyms or Alternate Spellings:

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Figure 1: spoke wheel sign
    Drag here to reorder.
  • Drag
    Case 1
    Drag here to reorder.
  • Drag
    Case 2
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.