When cerebral angiography was the mainstay of diagnosis certain displacements of the vessels principally pericallosal vessels in the angiogram were used as indirect evidences for the location of the masses in various regions of the brain.
These shifts are
- Round shift = Frontal lesion anterior to coronal suture
- Square shift = Lesion behind foramen of Monro in lower half of hemisphere
- Distal shift = Posterior to coronal suture in upper half of hemisphere
- Proximal shift = Basifrontal lesion / anterior middle cranial fossa including anterior temporal lobe
0 comments:
Post a Comment