case_images: PMC7398259_01
case_images: a Preoperative MRI. T1 weighted image, coronal plane. A mass sized 32 * 30 * 35 mm on the surface of the right frontal lobe, with heterogeneous iso- hyperintensive signal (lesion has <<popcorn>> sign), right chronic subdural hematoma with midline brainshift 3 mm. b Preoperative MRI. T2 weighted image, axial plane. This mass shows similar popcorn-shaped characteristics with perifocal edema. c Preoperative MRI. SWI sequence, axial plane. Ring of hypointensity around lesion (arrows)
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case_images: Fig1
case_images: Magnetic resonance imaging showed a right chronic subdural hematoma with a slight midline brain shift and a tumor mass with a "dura-tail" and "popcorn signs" and hemosiderin deposits in the right frontal region (Fig. 1).
case_images: Collision of cavernoma and meningioma (H&E x 100). Different size thick- and thin-walled vascular channels (triangles), hemorrhages (rectangle), fibrous tissue (ellipse) and meningioma (star) on opposite site are presented
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case_images: Fig2
case_images: Between the conglomerates of the vessels are determined the focuses of the tumor growth, consisting of meningotheliocyte-like cells, forming aggregations, the nuclei of the cells are light, moderately polymorphic, diffuse-focal interstitial lymphoid infiltration is defined, deposition of hemosiderin grains (Fig. 2).
case_images: Cavernous malformation was confirmed by SMA. Another part of the tumor (x 100)
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case_images: Fig3
case_images: In the immunohistochemical study, fragments of formation regarded as meningiomas are positively stained with antibodies to epithelial membrane antigen (Fig. 3).
case_images: Meningioma (Grade I) was confirmed by EMA. Another part of the same tumor (x 100)
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case_images: Fig4
case_images: A component regarded as CM was stained with antibodies to smooth-muscle actin - positive coloration on the walls of the blood vessels (Fig. 4).
case_images: Postoperative MRI. T1 weighted image, coronal section. No residual or recurrent tumor mass
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case_images: Fig5
case_images: MRI examination showed no residual or recurrent tumor mass in the original tumor area (Fig. 5).