Arachnoid cyst

Case contributed by Dr Abeer Ahmed Alhelali

Presentation

Headache.

Patient Data

Age: 30 years
Gender: Male
Modality: CT

Well circumscribed thin walled extra-axial CSF density mass in the right frontal area with remodelling effect on the adjacent bone. The remaining of the study is unremarkable.

Case Discussion

Arachnoid cysts are asymptomatic benign lesions. They are usually located within the subarachnoid space and contain CSF.

On imaging they are characterised as well circumscribed thin walled cysts, displacing adjacent structures and following the CSF pattern (hypodense on CT and hyperintense on T2 with FLAIR suppression on MRI). They can also have a remodelling effect on the adjacent bone.

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Case Information

rID: 51260
Case created: 8th Feb 2017
Last edited: 16th Feb 2017
Inclusion in quiz mode: Included

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