This site is targeted at medical and radiology professionals, contains user contributed content, and material that may be confusing to a lay audience. Use of this site implies acceptance of our Terms of Use.

Cleft sign

The cleft sign can be used to distinguish an extra axial lesion from an intra axial lesion and is typically used in the description of a meningioma.

Classically, the cleft was regarded as representing a thin rim of CSF between tumour and brain parencyma. However, it often is of high signal on FLAIR imaging and most likely represents a non-CSF tumour-brain interface.

Nevertheless, it remains a good sign that a mass is extraaxial and is typically made up of:

  • high T2 signal : (?) CSF (?) other
  • vessels - pial or as in case 1, larger vessels.
  • hypointense dura (on both T1 and T2 on the surface of the mass. (if extra dural)

Updating… Please wait.
Loadinganimation

 Details successfully updated.

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

 Thank you for updating your details.