Cerebellopontine angle cyst

At the time the article was last revised Ashesh Ishwarlal Ranchod had no financial relationships to ineligible companies to disclose. C erebellopontine angle CPA masses are relatively common. Although a diverse range of pathologies may be seen in cerebellopontine angle cyst region, the most common by far is vestibular schwannoma.

A CSF density lesion in the right cerebellopontine angle, with moderate local mass effect with mild displacement of the brainstem but no effacement of the fourth ventricle. No widening of the adjacent porus acousticus. Remodeling of the adjacent bone is, however, present. Conclusion: Right cerebellopontine angle cystic lesion most likely represents an incidental arachnoid cyst with a differential diagnosis that includes epidermoid cyst or cystic acoustic neuroma the latter two are thought less likely. As demonstrated on the preceding CT scan, within the right cerebellopontine angle is a well-circumscribed CSF intensity lesion with bony remodeling of the petrous apex and indentation of the middle cerebellar peduncle.

Cerebellopontine angle cyst

Federal government websites often end in. The site is secure. Arachnoid cysts are benign developmental collections of cerebrospinal fluid CSF. The cerebellopontine angle CPA arachnoid cysts are rare and often asymptomatic. The onset of symptoms and signs is usually due to the compression of the brain, cranial nerves and obstruction of CSF circulation. The major clinical symptoms for CPA arachnoid cysts were reported as headache, ataxia and 8 th cranial nerve palsy. We report a patient with a CPA arachnoid cyst. He presented with cranial nerve palsies and mirror movements found in upper extremities. We postulated that CPA arachnoid cyst compressing the brain stem and the pyramidal decussation may lead to mirror movements. We conclude that mirror movements can be associated with CPA arachnoid cyst. Arachnoid cysts are benign developmental collections of cerebrospinal fluid CSF contained within the arachnoid membrane. Middle cranial fossa is the most common site of occurrence, followed by the cerebellopontine angle CPA and suprasellar area. The arachnoid cysts of CPA usually remain asymptomatic so they are often diagnosed incidentally during radiological evaluation for other reason. We report a patient with CPA arachnoid cyst presenting with cranial nerve palsies and mirror movements caused by the compression of the brain stem. To our knowledge, this is the first case with mirror movements associated with an arachnoid cyst of CPA.

Updating… Please wait. Remodelling of the adjacent bone is, however, present. Article created:.

Objective: The optimal surgical management of arachnoid cysts remains controversial. The cerebellopontine angle CPA is a rare location for arachnoid cysts, and only 28 cases of arachnoid cysts occurring in the CPA have been reported in the literature. We discuss the diagnosis, radiographic imaging, and surgical management of CPA arachnoid cysts. Methods: Five patients three male and two female patients with a mean age of 5. Magnetic resonance imaging allows for the accurate diagnosis of these arachnoid cysts, which can present with only discrete symptoms, such as headache or ataxia.

At the time the article was last revised Ashesh Ishwarlal Ranchod had no financial relationships to ineligible companies to disclose. C erebellopontine angle CPA masses are relatively common. Although a diverse range of pathologies may be seen in this region, the most common by far is vestibular schwannoma. Cerebellopontine angle masses can be divided into four groups, based on imaging characteristics:. Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys. Updating… Please wait. Unable to process the form. Check for errors and try again. Thank you for updating your details.

Cerebellopontine angle cyst

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Recent Edits. Also patients have presented with nausea, vomiting, cerebellar signs, character change, memory disturbance. Close Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys. No abnormal enhancement. The Royal Melbourne Hospital. Contact Us. Case 8: vestibular schwannoma Case 8: vestibular schwannoma. Loading Stack - 0 images remaining. About Recent Edits Go ad-free. Klippel—Feil syndrome is the commonest disease associated with the mirror movements. For this reason, surgery could not be performed. Arachnoid cysts are benign developmental collections of cerebrospinal fluid CSF contained within the arachnoid membrane.

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The findings of the MRI were consistent with arachnoid cyst. Content follows CSF on all sequences including diffusion-weighted imaging. Figure 1. Rasmussen P. About Recent Edits Go ad-free. The ventricles are unremarkable in appearance with no evidence of a hydrocephalus. Ultrastructure and pathogenesis of intracranial arachnoid cysts. Case 1: meningioma Case 1: meningioma. Cerebellopontine angle cyst compressing the vagus nerve: Case report. Arachnoid cysts in the CPA are often asymptomatic. Conclusion: Right cerebellopontine angle cystic lesion most likely represents an incidental arachnoid cyst with a differential diagnosis that includes epidermoid cyst or cystic acoustic neuroma the latter two are thought less likely.