Arachnoid cyst

arachnoid cyst

arachnoid cyst n.
A fluid-filled cyst lined with arachnoid membrane, frequently situated in the sylvian fissure of the brain.


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  • Arachnoid membrane

    arachnoid membrane arachnoid membrane n. A delicate fibrous membrane forming the middle of the three coverings of the brain and spinal cord, closely attached to the dura mater, from which it is separated only by the subdural cleft, but separated from the pia mater by the subarachnoid space.

  • Arachnoid villus

    arachnoid villus arachnoid villus n. See arachnoid granulation.

  • Arachnoiditis

    arachnoiditis arachnoiditis a·rach·noid·i·tis (ə-rāk’noi-dī’tĭs) n. Inflammation of the arachnoid membrane and subarachnoid space.

  • Arachnology

    noun the study of arachnids

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