case_images: PMC11090575_01
case_images: Appearance of the lesion on (a) Axial three-dimensional fast spoiled gradient-echo sequence with contrast matter; (b) Axial T2 PROPELLER sequence; (c) Coronal T2 FLAIR PROPELLER sequence; (d) Axial T1 FLAIR sequence; (e) Axial diffusion-weighted imaging sequence with apparent diffusion coefficient map. FLAIR: Fluid-attenuated inversion recovery.
case_images: SNI-15-133-g001.jpg
case_images: PMC11090575_01_SNI-15-133-g001.jpg
case_images: F1
case_images: Magnetic resonance imaging (MRI) scans showed a large extraaxial (65 x 60 mm) parasagittal mass with compression of the frontal lobe and the frontal horns of both lateral ventricles [Figure 1].
case_images: (a) The lesion on an axial section of the preoperative magnetic resonance imaging scan; (b) Postoperative computed tomography head scan showing the subtotal resection of the lesion with decompression of the frontal horns of both lateral ventricles.
case_images: SNI-15-133-g002.jpg
case_images: PMC11090575_01_SNI-15-133-g002.jpg
case_images: F2
case_images: On postoperative day 1, a head computed tomography (CT) scan was performed - it revealed subtotal resection of the lesion [Figure 2].
case_images: Follow-up head magnetic resonance imaging scans were performed at (a) 7 months; (b) 15 months; (c) 20 months; (d) 31 months post-surgery.
case_images: SNI-15-133-g003.jpg
case_images: PMC11090575_01_SNI-15-133-g003.jpg
case_images: F3
case_images: PMC11090575_02
case_images: (a) The lesion on an axial section of the preoperative computed tomography (CT) scan with contrast matter; (b) Postoperative CT head scan showing the subtotal resection of the lesion and postoperative pneumocephalus, which was asymptomatic.
case_images: SNI-15-133-g004.jpg
case_images: PMC11090575_02_SNI-15-133-g004.jpg
case_images: F4
case_images: CT scans revealed a large extra-axial (73 x 58 mm) parasagittal mass in the left parietooccipital region, encasing the superior sagittal sinus and dislocating the interhemispheric fissure 7 mm to the right [Figure 4a]. Postoperatively, the patient was transferred to the intensive care unit for intensive monitoring - he was transferred back to the neurosurgical ward on postoperative day one after a head CT scan showing gross total resection of the mass [Figure 4b].
case_images: (a) The lesion on an axial section in the late phase of the preoperative computed tomography (CT) scan with contrast matter; (b) Postoperative CT head scan showing the subtotal resection of the lesion.
case_images: SNI-15-133-g005.jpg
case_images: PMC11090575_02_SNI-15-133-g005.jpg
case_images: F5
case_images: CT scan showed a multifocal recurrent mass at the previous location, with the largest focus having a diameter of 49 mm [Figure 5a]. A head CT scan was done on postoperative day 1, showing subtotal resection of the mass - a small residual tumor with a diameter of 8 mm remained on the falx [Figure 5b].