PMC7533091_01
Preoperative axial (a) and coronal (b) computed tomography revealed a right parietal convexity acute subdural hematoma. Retrospective detailed history revealed a meningioma diagnosed 1 year earlier. A tumor was noted at the site of hemorrhage (c-d).
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F1
Computed tomography revealed a 5 cm ASDH located in the right parietal and frontal lobes [Figure 1a and b].
Intraoperative findings show a hematoma attached to the dura mater (white arrow, a) and pia mater (white arrowhead, b), both of which remained intact.
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F2
The ASDH included parenchyma components and was located extra-axially with intact pia mater and dura mater attached [Figure 2].
Hematoxylin and eosin (H and E) staining revealed a transitional meningioma (a-c). Lobular and fascicular foci appeared with conspicuous tight whorls and psammoma bodies (a, b). Expanded vessels with thin walls were visible within the tumor itself (c). Original magnification x40 (a) and x100 (b, c).
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F3
The tumor was highly vascularized with expanded thin-walled vessels detected in parts [Figure 3].
Retrospective detailed history revealed a meningioma diagnosed 1 year earlier. A tumor was noted at the site of hemorrhage (a-b).
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F4
Postoperatively, the medical history taken from the patient's family revealed the fact that he had an incidental finding of a small right convexity meningioma 1 year previously by another clinician [Figure 4a and b].