IMPORTANT: We currently have a number of bugs related to image cropping and are actively trying to resolve them. In the meantime, we have disabled cropping. Apologies for any inconvenience. Stay informed: radiopaedia.org/chat

Arachnoid cyst with mass effect

Case contributed by Maxime St-Amant
Diagnosis almost certain

Presentation

Right-sided hemiparesis.

Patient Data

Age: 40 years old
Gender: Female

Large CSF-isodense extra-axial lesion with marked mass effect on the left cerebrum including the precentral and post central gyri with rightward midline shift, compression of the left lateral ventricle and trapped right lateral ventricle.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.