Entrapment of the temporal horn secondary to postoperative gamma-knife radiosurgery in intraventricular meningioma: A case report

Figure 1 Entrapment of the temporal horn secondary to postoperative gamma-knife radiosurgery in intraventricular meningioma. A: A computed tomography scan showing a lesion in the right trigon of the ventricle; B: Magnetic resonance imaging (MRI) before the first operation showing a lesion with homogenous enhancement in the right trigone of the ventricle; C: MRI at 3 mo after the first operation showing residual tumor without substantial dilation of the temporal horn; D: MRI at 1 mo after gamma-knife radiosurgery (GKS) showing slight dilation of the temporal horn; E: MRI at 8 mo after GKS showing substantial dilation of the temporal horn; F: MRI at 1 mo after the second operation showing a normal temporal horn.

Figure 2 Entrapment of the temporal horn secondary to postoperative gamma-knife radiosurgery in intraventricular meningioma. A: Pathology after first operation. Microscopically, the tumor cells were spindle-shaped and bundle-shaped with slightly larger and darker nuclei, and the diagnosis was meningioma; B: Pathology after second operation. Microscopically, the tumor cells were patchy, densely arranged, and slightly atypical, with massive necrosis and hemorrhage locally. The diagnosis was atypical meningioma.

Figure 3 Timeline showing events starting from the onset of symptoms until ultimate outcome.