intra- vs. extra-axial brain mass

                                                  Intra         Extra
                                                  -----         -----

      contiguity with bone or dura                  -             +

      CSF cisterns                               effaced       widened

      bony changes                                rare          often

      cortico-medullary buckling                    -             +

      vascular supply                            internal      external

© 2002, C.E. Kahn, Jr.
2002-04-18