• When present, symptoms usually occur when the cysts compress the spinal cord or other nearby nerves. (nih.gov)
  • Spinal intradural arachnoid cysts are often present at birth and are caused by developmental abnormalities in the spinal cord that occur during the pregnancy. (nih.gov)
  • Acquired encephaloceles occur as a result of chronic ear disease, aberrant arachnoid granulations , trauma, and iatrogenic causes. (thefreedictionary.com)
  • Spontaneous CSF temporal bone leakage might occur as a result of an encephalocele or secondary to the development of arachnoid granulations along the tegmen of the middle ear or mastoid. (thefreedictionary.com)
  • Although there is disagreement in the medical community regarding when to treat spinal intradural arachnoid cysts, the need for treatment generally depends on the size and location of the cyst and whether or not it is causing symptoms. (nih.gov)
  • Extradural arachnoid cysts in the spine are relatively uncommon causes of spinal cord compression in the pediatric population that are thought to arise from congenital defects in the dura mater. (utah.edu)
  • The presence of preexisting arachnoid granulations facilitates the formation of brain herniation into the dural venous sinus (DVS) or adjacent calvarium. (thefreedictionary.com)