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Ring enhancing nodule (MRI)

Post-contrast T1-weighted sagittal image shows a ring enhancing nodule (clotted aneurysm on angiogram) with a rim of faint T1-signal border situated superior to it, outlining the acute bleed. Note the flow-voids compatible with hyperdynamic flow. (Contributed by Dr. Gaurang Shah.)

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Associated Disorders

  • Cobb syndrome
  • familial cerebral cavernous malformation syndrome
  • hereditary hemorrhagic telangiectasia