Arachnoid Cysts

Intracranial or spinal cavities containing a cerebrospinal-like fluid, the wall of which is composed of arachnoidal cells. They are most often developmental or related to trauma. Intracranial arachnoid cysts usually occur adjacent to arachnoidal cistern and may present with HYDROCEPHALUS; HEADACHE; SEIZURES; and focal neurologic signs. (From Joynt, Clinical Neurology, 1994, Ch44, pp105-115)

Also Known As:

Intracranial Arachnoid Cysts; Arachnoid Cysts, Intracranial; Arachnoid Cyst, Intracranial; Arachnoid Diverticulas; Cyst, Arachnoid; Cyst, Intracranial Arachnoid; Cyst, Leptomeningeal; Cysts, Arachnoid; Cysts, Intracranial Arachnoid; Cysts, Leptomeningeal; Diverticula, Arachnoid; Diverticulas, Arachnoid; Intracranial Arachnoid Cyst; Leptomeningeal Cyst; Arachnoid Diverticula; Leptomeningeal Cysts

Neoplasms: 1324753
- Cysts: 25757
  - Arachnoid Cysts: 231
- Neoplasms by Site: 4
  - Nervous System Neoplasms: 235
    - Central Nervous System Neoplasms: 818
      - Central Nervous System Cysts: 188
        Arachnoid Cysts: 231
Nervous System Diseases: 14178
- Nervous System Neoplasms: 235
  - Central Nervous System Neoplasms: 818
    - Central Nervous System Cysts: 188
      - Arachnoid Cysts: 231
- Nervous System Malformations: 35
  - Central Nervous System Cysts: 188
    - Arachnoid Cysts: 231
Congenital, Hereditary, and Neonatal Diseases and Abnormalities: 933
- Congenital Abnormalities: 25723
  - Nervous System Malformations: 35
    - Central Nervous System Cysts: 188
      - Arachnoid Cysts: 231

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