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Type 3 middle fossa arachnoid cyst (CT)

An enormous cyst, with mass effect and hydrocephalus. The underlying temporal lobe was severely atrophic. (Contributed by Dr. Sherman Stein.)

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Associated Disorders

  • Agenesis of the corpus callosum
  • Ankylosing spondylitis
  • Aqueductal stenosis
  • Arteriovenous malformation
  • Attention deficit hyperactivity disorder
  • Chiari malformation type 1
  • Cranial asymmetry
  • Epilepsy
  • Glutaric aciduria type 1
  • Lymphedema-distichiasis syndrome
  • Myotonic dystrophy
  • Neural tube defects
  • Neurofibromatosis
  • Spinal extradural arachnoid cysts
  • Tuberous sclerosis