case_images: PMC8422425_01
case_images: Axial (a), coronal (b), and sagittal (c) T1 gadolinium-enhanced brain MRI of arachnoid cyst (7 x 8 x 7 cm).
case_images: SNI-12-418-g001.jpg
case_images: PMC8422425_01_SNI-12-418-g001.jpg
case_images: F1
case_images: Magnetic resonance imaging (MRI) scans showed giant arachnoid cyst of the right hemisphere [Figure 1].
case_images: Monopolar (a) and bipolar (b) EEG showing epileptiform activity. T2-FLAIR MRI (c) revealed signs of local swallowing of brain tissue. CT cisternography (d) shows no signs of contrast in the cyst's cavity despite filling of lateral ventricles with contrast.
case_images: SNI-12-418-g002.jpg
case_images: PMC8422425_01_SNI-12-418-g002.jpg
case_images: F2
case_images: EEG detected epileptiform activity from the right frontal lobe [Figures 2a and b]. Computed tomography (CT) cisternography confirmed that cyst was isolated from subarachnoid space [Figures 2c and d].
case_images: Patients positioning (a), intraoperative findings (b and c).
case_images: SNI-12-418-g003.jpg
case_images: PMC8422425_01_SNI-12-418-g003.jpg
case_images: F3
case_images: Histological findings (a and b) and postoperative monopolar (c) and bipolar (d) EEG.
case_images: SNI-12-418-g004.jpg
case_images: PMC8422425_02_SNI-12-418-g004.jpg
case_images: F4
case_images: Postoperative course was fine, headaches disappeared, EEG showed resolution of epileptiform activity [Figure 4c and d].
case_images: PMC8422425_02
case_images: Histological findings (a and b) and postoperative monopolar (c) and bipolar (d) EEG.
case_images: SNI-12-418-g004.jpg
case_images: PMC8422425_02_SNI-12-418-g004.jpg
case_images: F4
case_images: Postoperative course was fine, headaches disappeared, EEG showed resolution of epileptiform activity [Figure 4c and d].