case_images: PMC7176925_01
case_images: (A) The Computed tomography demonstrated the calcification in right Sylvian fissure and posterior part of insula. (B,C) MRI scans revealed a lesion without dural attachment located in right insular lobe which was mainly hypointense on both T1-weighted and T2-weighted. (D) Lesion showed hypointense on susceptibility weighted imaging. Enhanced MRI showed no obvious enhancement after gadolinium administration in axial (E) and coronal (F) position.
case_images: fonc-10-00427-g0001.jpg
case_images: PMC7176925_01_fonc-10-00427-g0001.jpg
case_images: F1
case_images: Computerized tomography (CT) demonstrated a calcific lesion in the right Sylvian fissure and posterior part of the insula (Figure 1A). An MRI scan revealed a lesion in the right insular lobe without any dural attachment, which was primarily hypointense on both T1- and T2-weighted MRI (Figures 1B,C). Additionally, the lesion appeared hypointense on susceptibility-weighted imaging (Figure 1D), with no obvious enhancement despite administration of gadolinium contrast (Figures 1E, F).
case_images: (A) The tumor tissue arranged in swirl structure to form the meningeal corpuscle. (B) Psammoma bodies. (C) The meningeal corpuscles invade normal brain tissue. (D) GFAP staining show brain tissue (+) and meningeal corpuscles (-). Postoperative CT (E) and MRI (F,G) showed tumor gross total resection.
case_images: fonc-10-00427-g0002.jpg
case_images: PMC7176925_01_fonc-10-00427-g0002.jpg
case_images: F2
case_images: II meningioma of atypical type (Figures 2A-D). Immunohistochemical examinations revealed negative immunoreactivity for Ki-67, progesterone receptor, p53, epithelial membrane antigen, and positive immunoreactivity for vimentin, and somatostatin receptor 2. A follow-up gadolinium-enhanced MRI (postoperative 2 weeks) showed complete total excision of the tumor (Figures 2E-G).