What is an incidental arachnoid cyst?

What is an incidental arachnoid cyst?

Arachnoid cysts are common incidental findings on cross-sectional neuroimaging of the brain. When they are present in the appropriate location and of significant size, they can be symptomatic and require treatment. Also, they rarely occur in the spine and can result in symptoms.

Is Retrocerebellar arachnoid cyst?

The differential diagnosis of retrocerebellar arachnoid cysts includes mega cisterna magna, Dandy-Walker malformation, vermian-cerebellar hypoplasia, epidermoid cysts, cystic tumors, non-neoplastic cysts, subdural hygroma, and chronic subdural hemorrhage [2,6,7].

What is intraventricular cyst?

“Intraventricular simple cyst” describes a cystic lesion in the cranial ventricles that follows CSF on all imaging modalities and phases/sequences. The lesion may be lined by arachnoid or ependymal cells, but this is indistinguishable on imaging.

What causes choroid fissure cyst?

Developmental errors may occur at the time of formation of primitive choroid plexus anywhere along the choroid fissure, thus forming a cyst5). However, the etiology is stil controversial. The cysts may be of the neuroepithelial or arachnoid type5).

What is Retrocerebellar cyst?

These cysts posterior to the cerebellum, presenting in children younger than 5 years, are labeled developmental retrocerebellar cysts (DRCCs) under a new classification in relation to neuroendoscopy. Methods: DRCC was categorized as type 0 for asymptomatic enlarged cistern magna and was not treated.

What is a right choroid plexus cyst?

A choroid plexus cyst is a small, fluid-filled space that occurs in a gland in the brain called the choroid plexus. This gland is located on both the left and right sides of the brain, and the fluid it produces surrounds the brain and spinal cord to protect them from injury. This type of cyst develops in some fetuses.

How common is choroidal fissure cyst?

Choroidal fissure cysts are rare and often incidentally discovered [1]. There are a few cases reported and they are usually asymptomatic. The relationship between complex partial seizure and temporal fissure cyst is controversial [2].

What is arachnoid cyst?

Arachnoid cysts are relatively common benign and asymptomatic lesions occurring in association with the central nervous system, both within the intracranial compartment (most common) as well as within the spinal canal. They are usually located within the subarachnoid space and contain CSF.

Which radiographic findings are characteristic of choroidal fissure cysts?

Choroidal fissure cysts may represent either neuroepithelial cysts (including neuroglial or glioependymal cysts) 2, 6 or arachnoid cysts, although reports of pathologic confirmation are scant. Radiographic features. They are usually small and range around about 1-2 centimeters in diameter. Occasionally, larger cysts may be seen.

What is the difference between arachnoid and choroidal fissure?

Arachnoid cyst represents 1% of all intracranial masses, with the choroidal fissure cyst representing approximately 7.4% of the total. They can be from the neuroepithelial or arachnoid origin. The choroid plexus is an important landmark to determine its origin from the choroidal fissure or the temporal horn.

What is an intracranial choroid fissure?

Choroidal fissure cysts, also known as choroid fissure cysts, are benign intracranial cysts occurring within the choroidal fissure. They are therefore a location-based diagnosis rather than a distinct pathological entity. On this page: Article: