CEREBRAL ASTROBLASTOMA RESEMBLING AN EXTRAAXIAL NEOPLASM

A case of a cerebral astroblastoma is described in which MR imaging fi ndings suggested the diagnosis of an extra-axial neoplasm. The lesion was proven to be intracerebral both surgically and histopathologically . Calvarial erosion, and buckling of the cerebral cortex by a peripher ally located well circumscribed, highly enhancing mass, were the main MR findings leading to an errogenous preoperative diagnosis of an extr a-axial mass. An astroblastoma should be included to the differential diagnosis of a superficially located tumor presenting with the finding s of an extra-axial mass, especially in a young patient.