Edit concept Question Editor Create issue ticket

Arachnoid Cyst

Intracranial Arachnoid Cyst


  • If other abnormalities are present aside from the brain, a geneticist may be consulted to determine if a genetic condition is present as well as recommend any additional testing. The newborn will be observed for the development of seizures.[fetalhealthfoundation.org]
  • 80 years. 1–6 In their typical presentation, spinal arachnoid cysts cause progressive signs and symptoms suggesting spinal cord compression.[mdedge.com]
  • Choroid plexus-like tissue can be present within the cyst wall. This ectopic tissue secretes cerebrospinal fluid, resulting in progressive distention of the cyst ( Diakoumakis et al., 1986 ).[obgyn.mhmedical.com]
  • The authors report on a case series that illustrates the diverse forms of presentation and the treatment modalities commonly used for arachnoid cysts.[thejns.org]
  • He also complained of memory disturbances, which had been present for a year. The patient denied any history of headache, emesis, or impairment of consciousness.[signavitae.com]
  • Falcone C, Tinelli E, Pierallini A, Caramia F, Bruti G, et al. (2005) Spontaneous disappearance of juxta-sylvian cyst: MRI study and clinical evaluations [in Italian]. Riv Neuroradiol 18: 54.[omicsonline.org]
  • Common symptoms of arachnoid cysts include: Headaches Nausea Vomiting Balance issues Treating arachnoid cysts The preferred surgical treatment at UPMC for arachnoid cysts is through small openings at the side of the skull.[upmc.com]
  • Headache associated with nausea, vomiting, double vision.[medicaljoyworks.com]
  • Typical symptoms of an arachnoid cyst around the brain include headache, nausea and vomiting, seizures, hearing and visual disturbances, vertigo, and difficulties with balance and walking.[ninds.nih.gov]
  • Symptoms can occur a bit differently in each person, but can include: Headache Nausea and vomiting Vertigo or dizziness Hearing or vision problems Trouble with balance and walking Seizures Behavioral changes An arachnoid cyst on the spinal cord can compress[fairview.org]
  • In the second group, the cysts presented with vague symptoms of dizziness, headaches, large head, skull abnormalities, strabismus, seizures, and developmental delays.[cureus.com]
Visual Hallucination
  • He experienced no auditory or visual hallucinations. The patient had no personal history of substance abuse. However, family medical history did include an older brother with schizophrenia.[academic.oup.com]
  • Headache is the most common presenting symptom. The headache caused by increased intracranial pressure is classically characterized by position, worsening when laying down and improving on sitting up or standing.[n.neurology.org]
  • Migraines & cluster headaches have also reported. Arachnoid cysts in the temporal fossa result in non-specific headaches.[medicaljoyworks.com]
  • Thus, the cyst disappeared, and so did his headache. He has now been followed up for 23 months after surgery, without reproduction of the cyst or the headache.[jnnp.bmj.com]
  • Vertigo Difficulties with balance and walking Headaches Seizures Decreased cognitive performance Hemiparesis (weakness or paralysis on one side of the body) Ataxia (lack of muscle control) Arachnoid cysts around the spinal cord compress the spinal cord[weillcornellbrainandspine.org]
  • Symptomatic patients may be candidates for surgery; operative management may improve symptoms such as headache or dizziness in some patients. 4 However, most lesions are considered incidental and can be treated conservatively. 1, 2 Footnotes Competing[cmaj.ca]
  • Her exam showed no evidence of papilledema on fundoscopic exam. An MRI Brain showed a 6.1 x 3.8 cm retrocerebellar arachnoid cyst with mass effect on the cerebellar vermis. She underwent a posterior fossa craniotomy and fenestration of the cyst.[n.neurology.org]
  • His neurological examination showed no focal neurological abnormality, cranial nerve deficit or papilledema. MRI of the brain (Fig.[jbsr.be]
  • At 6 months, he developed mild papilledema and the MR showed slight enlargement of the AC. A cystoperitoneal shun was placed.[surgicalneurologyint.com]
  • There was no papilledema. Radiology consultation revealed that the arachnoid cyst was not connected with ventricles and CSF.[dusunenadamdergisi.org]
  • Symptoms include macrocrania, headaches, vomiting, lethargy, papilledema, and impairment of upward gaze and other ocular disorders [26]. Due to the compressive symptoms produced by these cysts, it is imperative that they be treated.[cureus.com]
  • They are not generally confused with subarachnoid cysts because of their location. MANAGEMENT OF SUBARACHNOID CYSTS Conventionally, nearly all subarachnoid cysts are considered "benign" and no active management is required.[dizziness-and-balance.com]
  • Arachnoid cysts may be confused with several intracranial cysts of various etiologies. The confusion is much more likely to occur with CT.[emedicine.medscape.com]
  • Headaches and neck-pain, nausea and vomiting, tiredness/lethargy and confusion may result from the raised intracranial pressure. • Focal neurological deficit – Localised pressure may lead to specific neurological deficits, ie weakness, numbness, speech[svphm.org.au]
  • Chronic subdural hematoma and porencephalic cyst can also be confused for an arachnoid cyst [ 12 ]. Teaching Point Being a multicompartmental lesion does not necessarily indicate malignancy.[omicsonline.org]
  • Professor Emeritus, Department of Clinical Medicine, Department of Surgical Sciences, University of Bergen and Department of Neurosurgery, Haukeland University Hospital, Bergen, Norway "The Editor has done an excellent effort in organizing a somewhat confusing[elsevier.com]
Lip Smacking
  • A previously healthy 72-year-old woman presented to the emergency department after awakening from sleep with several minutes of impaired responsiveness, lip smacking and complex motor movements of her limbs.[cmaj.ca]
  • He described a 3 week history of vertigo, diplopia and behavioural disturbances, including somnolence and fatigue. He also complained of memory disturbances, which had been present for a year.[signavitae.com]


  • Arachnoid Cyst Treatment Some doctors prefer to treat only symptomatic arachnoid cysts. Others advocate treatment for asymptomatic cysts to prevent the possibility of future damage.[upmc.com]
  • Symptoms usually resolve or improve with treatment.[ninds.nih.gov]
  • Arachnoid Cyst Treatment Arachnoid cysts — even large ones — that do not cause symptoms or put pressure on the brain or spinal cord do not require treatment.[hopkinsmedicine.org]
  • With treatment, most individuals with arachnoid cysts have a good prognosis.[columbianeurosurgery.org]


  • Prognosis Untreated, arachnoid cysts may cause permanent severe neurological damage when progressive expansion of the cyst(s) or bleeding into the cyst injures the brain or spinal cord.[ninds.nih.gov]
  • With treatment, most individuals with arachnoid cysts have a good prognosis.[columbianeurosurgery.org]
  • Prognosis: Isolated small cyst: normal neurodevelopment. Large and compressing cyst: surgery is required to prevent long term sequelae, including seizures, headache, motor deficit or neurodevelopmental delay.[fetalmedicine.org]
  • The good news is that the prognosis for those with arachnoid cysts is excellent, and the surgery to drain or remove a cyst is safe and effective (see Surgery for Arachnoid Cysts ).[weillcornellbrainandspine.org]


  • Etiology Different mechanisms may explain the increase in volume of the cysts: fluid secretion by cells of the cyst wall, unidirectional valvula or fluid movements secondary to movements of vein walls.[orpha.net]
  • […] ultrasound screening) or be discovered during childhood or adulthood Sites Arise within both cranial and spinal meninges Expand at expense of brain or spinal cord Favored intracranial sites include middle fossa near temporal lobe and cerebellopontine angle Etiology[pathologyoutlines.com]
  • Ideally, as our understanding of the etiology of arachnoid cysts and impact upon the surrounding brain improves, we may be able to improve our approaches to intervention and patient outcomes. References View All 1.[aansneurosurgeon.org]
  • Available from: Arachnoid cyst in extradural location is a rare etiology of compressive myelopathy. Most of these cysts are asymptomatic and detected incidentally.[jcvjs.com]
  • Etiology and Pathophysiology Several theories of arachnoid cyst formation ( 4 ) Agenesis of part of the brain Defect in the arachnoid development, leading to membrane splitting or duplication creating diverticula Failure of temporal embryonic meninges[unboundmedicine.com]


  • Summary Epidemiology Studies carried out since the advent of MRI and CT suggest that the prevalence is higher than previously thought, perhaps as high as 1 per 5000.[orpha.net]
  • This volume thus contains chapters on biology, theories on physiological mechanisms, epidemiology, and natural history…The second volume (Clinical and surgical management) is collected with the purpose of providing information related to clinical practice[elsevier.com]
  • […] processes Surrounded by arachnoid scarring Contains CSF and possibly hemosiderin-stained or inflammatory cells Usually communicates with the subarachnoid space System(s) affected: central nervous; peripheral nervous Synonym(s): leptomeningeal cysts Epidemiology[unboundmedicine.com]
  • More specific prognoses are listed below: Patients with impaired preoperative cognition had postoperative improvement after surgical decompression of the cyst. [31] [32] Surgery can resolve psychiatric manifestations in selected cases. [33] Epidemiology[en.wikipedia.org]
  • The article is written according to the Strengthening the Reporting of Observational Studies in Epidemiology Statement guidelines.[jcvjs.com]
Sex distribution
Age distribution


  • Caterpillar-like Arachnoid Cysts Following Initial Resection: A Unique Presentation of a Disorder Where the Limits of Modern Medicine Are Reached. ( 30937244 ) Kaloostian SW...Kaloostian PE 2019 5 Spinal Arachnoid Cysts: Presentation, management and pathophysiology[malacards.org]
  • Etiology and Pathophysiology Several theories of arachnoid cyst formation ( 4 ) Agenesis of part of the brain Defect in the arachnoid development, leading to membrane splitting or duplication creating diverticula Failure of temporal embryonic meninges[unboundmedicine.com]
  • Article / Publication Details First-Page Preview Abstract For clarifying the pathophysiology of arachnoid cysts and restablishing therapeutic criteria for such cases, we reviewed a series of 90 cases with arachnoid cysts focusing on the traumatic origin[karger.com]
  • […] neurosurgeon Knut Wester is internationally recognized for dedicating a large part of his long clinical and academic career to the treatment and study of arachnoid cysts…The first volume (Epidemiology, biology, and neuroimaging) discusses pathology and pathophysiology[elsevier.com]
  • The role of the cerebellum in the pathophysiology and treatment of neuropsychiatric disorders: a review. Brain Res Rev 2008 ; 59 : 185 – 200. Published by Oxford University Press and JSCR Publishing Ltd. All rights reserved. The Author 2017.[academic.oup.com]


  • Surgery for arachnoid cysts The goals of surgery are to drain the cyst and prevent it from refilling.[upmc.com]
  • This approach can be helpful to prevent the need for a cystoperitoneal shunt placement. In select patients, existing cystoperitoneal shunts (usually placed in childhood) can be removed with endoscopic fenestration of the cysts.[pacificneuroscienceinstitute.org]
  • Large and compressing cyst: surgery is required to prevent long term sequelae, including seizures, headache, motor deficit or neurodevelopmental delay. Recurrence: No increased risk of recurrence.[fetalmedicine.org]
  • As they are surgically removable lesions, early and definite diagnosis is important in preventing clinical deterioration. MRI is recommended for the diagnosis and preoperative planning.[nature.com]
  • In this article, we present our institutional experience of EDAC and review management options and surgical nuances to prevent recurrence.[jcvjs.com]

Ask Question

5000 Characters left Format the text using: # Heading, **bold**, _italic_. HTML code is not allowed.
By publishing this question you agree to the TOS and Privacy policy.
• Use a precise title for your question.
• Ask a specific question and provide age, sex, symptoms, type and duration of treatment.
• Respect your own and other people's privacy, never post full names or contact information.
• Inappropriate questions will be deleted.
• In urgent cases contact a physician, visit a hospital or call an emergency service!