Dysembryoplastic Neuroepithelial Tumor

  • Etiology: Neoplasm
  • Imaging MRI:
    — Temporal lobe (60%)
    — Megagyrus due to infiltration through the cortex
    — Triangular in shape
    — T2WI: Bubbly in appearance
  • DDX:
  • Complications:
  • Treatment:
  • Clinical: Intractable seizures

Radiology Cases of Dysembryoplastic Neuroepithelial Tumor

MRI of dysembryoplastic neuroepithelial tumor / DNET
Axial T1 without contrast (above left), T2 (above right) and T1 with contrast (below left) MRI of the brain show a round heterogenous lesion in the medial aspect of the left temporal lobe that appears to extend into the cortex, has a small amount of surrounding edema, and does not enhance. On gradient echo (below right) there is some hemosiderin staining in the lesion but no hemosiderin ring around it.