case_images: PMC10794320_01
case_images: Preoperative MRI images showing two lesions, one on the floor of the middle fossa and the other in the pterygium region, both on the left. (A) Contrast-enhanced T1-weighted MRI of the pterional lesion, which appears hyper-intense and with homogeneous contrast uptake. (B) Coronal T2 MRI showing the two lesions. (C) Axial CT scan, without contrast, showing that the deeper lesion is hyper-dense in relation to the parenchyma. (D) Axial CT scan without contrast. (E) Contrast-enhanced T1-weighted MRI of the deepest lesion, which appears hyper-intense and with homogeneous contrast uptake. MRI: Magnetic Resonance Imaging. CT: Computed Tomography.
case_images: pore-29-1611482-g001.jpg
case_images: PMC10794320_01_pore-29-1611482-g001.jpg
case_images: F1
case_images: A CT scan of the skull revealed two lesions (see Figure 1): one on the floor of the left middle fossa and the other on the lateral third of the lesser wing of the sphenoid (pterional), both on the left side. The brain MRI (see Figure 1) indicated that the presumed pterional lesion was extra-axial and had dural implantation in the left temporal convexity, suggesting the presence of a convexity meningioma.
case_images: Intraoperative image showing a hyper-pigmented lesion.
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case_images: PMC10794320_01_pore-29-1611482-g002.jpg
case_images: F2
case_images: This lesion exhibited pigment diffusion through the adjacent arachnoid (see Figure 2) and displayed a favorable cleavage plane with the adjacent parenchyma.
case_images: Histological examination of the lesion. Stained with HE and melan A.
case_images: pore-29-1611482-g003.jpg
case_images: PMC10794320_01_pore-29-1611482-g003.jpg
case_images: F3
case_images: The histology revealed a neoplasm characterized by spindle-shaped and epithelioid cells, featuring nuclei with vesicular chromatin, occasionally evident nucleoli, and amphophilic cytoplasm (see Figure 3).