PMC6743692_01
Following gadolinium injection, axial. (a) Coronal. (b) And sagittal. (c) Sections of T1-weighted magnetic resonance imaging demonstrating the parafalcine tumor localized in the right posterior parietal region before the first operation. Note the close spatial relationship of the tumor to the falx cerebri.
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F1
Magnetic resonance imaging (MRI) of the head revealed a 3-cm diameter right posterior parietal parafalcine, dura based, enhancing lesion, suggesting an extra-axial tumor [Figure 1].
Postoperative axial computed tomography following contrast administration. (a) Revealing a subgaleal extracranial homogenous low-density lesion with rim enhancement (right). There was also another intracranial ring-enhancing collection at the site of the tumor resection cavity (left), suggesting a brain abscess (arrow). Postoperative magnetic resonance imaging showing both extracranial and parafalcine cystic masses with homogenous, low-intensity signal on T1-weighted images. (b and c) And high-intensity signal on the fluid-attenuated inversion recovery sequence. (d) There was peripheral enhancement after gadolinium injection (b and c) and significant cerebral edema surrounding the resection cavity. (d) Note the restricted diffusion-weighted image (bright signal) of the extracranial and parafalcine collections (e).
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There was also another intracranial ring-enhancing collection at the glioblastoma resection cavity, suggesting a brain abscess [Figure 2a]. The MRI showed both extracranial and parasagittal cystic masses with homogenous, low-intensity signal on T1-weighted images, and high-intensity signal on fluid-attenuated inversion recovery sequences, with significant cerebral edema surrounding the resection cavity and peripheral enhancement after gadolinium injection [Figure 2b-2e].