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Diagnosis: Arteriovenous malformation.

Radiology Findings

CT of the brain without contrast:

  • Old left parietal encephalomalacia, likely gliosis.
  • Focal 6 mm area of increased attenuation in the mid lateral left temporal lobe.
MRI of the brain with and without contrast:
  • Hyperintense T2 signal abnormality in the left parietal lobe consistent with gliosis, likely from old hemorrhage.
  • In the left high parietal lobe, there is a 1.5 cm area of increased
    serpiginous flow voids with feeding and draining vessels that represents an arteriovenous malformation.
  • Large draining cortical vein is seen on the left temporal region that is contiguous with the arteriovenous malformation.
  • MRA demonstrates nidus of vessels in the left parietal region with connection to a large left cortical draining vein.

Differential Diagnosis

  • Arteriovenous malformation.
  • Anaplastic astrocytoma.
  • Glioblastoma multiforme.
  • Capillary telangiectasia.
  • Cavernous angioma.
  • Venous angioma.

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