PREDOMINANTLY EXTRAAXIAL ASTROBLASTOMA - IMAGING AND PROTON MR SPECTROSCOPY FEATURES

The CT, angiographic, MR, and proton MR spectroscopy findings in a cas e of astroblastoma, a rare neoplasm of glial cell origin, are presente d. Of particular interest is the predominantly extraaxial location of the tumor. CT and MR demonstrated a complex mass consisting of a solid nodule and a peripheral septated cystic component. The extraaxial nat ure of the mass was suggested on MR.