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Pleomorphic Xanthoastrocytoma (PXA)

Last Updated: October 1, 2018

Figure 1: This PXA demonstrates avid enhancement on postcontrast T1WI (top row). The nonenhancing cystic components are also evident. The adjacent enhancing dural thickening (dural tail) is also a variable feature of PXA. Edema is also variable and may be present, as on this axial T2WI (bottom).


Figure 2: T1 pre- (top row left) and post-contrast (top row right – axial, bottom row left - coronal) images show a brightly enhancing superficial lesion in the left parietal lobe. Although sometimes present, no duraltail is visible in this example of PXA. A cyst or CSF cleft around the mass is clearly visible on coronal T2-weighted image (bottom row right). The large amount of surrounding hyperintense edema is also more clearly visible on T2.

Basic Description

  • Supratentorial cortical/p...