- Arachnoid cysts, intracranial
- Intracranial arachnoid cysts
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Signs and symptoms of arachnoid cysts that are located around the brain may include headache, nausea, vomiting and and the accumulation of excessive cerebrospinal fluid in the brain (hydrocephalus), resulting in increased intracranial pressure. In rare cases, in some children, an arachnoid cyst can cause malformation of certain cranial bones, resulting in an abnormally enlarged head (macrocephaly). Depending on the location of the cyst within the brain, other symptoms may include seizures, hearing and visual disturbances, vertigo, and difficulties with balance and walking. Neurological signs may be present because arachnoid cysts may cause increased pressure on structures of the brain. Such neurological findings may include developmental delays, behavioral changes, an inability to control voluntary movements (ataxia), difficulties with balance and walking and cognitive impairment. Weakness or paralysis on one side of the body (hemiparesis) has also been reported.
Arachnoid cysts located around the spinal cord can compress the spinal cord or nerve roots and may cause symptoms such as progressive back and leg pain, and/or tingling or numbness in the legs or arms.
The Human Phenotype Ontology provides the following list of signs and symptoms for Arachnoid cysts. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the MedlinePlus Medical Dictionary to look up the definitions for these medical terms.
|Signs and Symptoms||Approximate number of patients (when available)|
|Autosomal recessive inheritance||-|
The Human Phenotype Ontology (HPO) has collected information on how often a sign or symptom occurs in a condition. Much of this information comes from Orphanet, a European rare disease database. The frequency of a sign or symptom is usually listed as a rough estimate of the percentage of patients who have that feature.
The frequency may also be listed as a fraction. The first number of the fraction is how many people had the symptom, and the second number is the total number of people who were examined in one study. For example, a frequency of 25/25 means that in a study of 25 people all patients were found to have that symptom. Because these frequencies are based on a specific study, the fractions may be different if another group of patients are examined.
Sometimes, no information on frequency is available. In these cases, the sign or symptom may be rare or common.
- Arachnoid Cysts. National Organization for Rare Disorders (NORD). March 5, 2015; http://rarediseases.org/rare-diseases/arachnoid-cysts/.
- NINDS Arachnoid Cysts Information Page. NINDS. September 11, 2015; http://www.ninds.nih.gov/disorders/arachnoid_cysts/arachnoid_cysts.htm.