PMC5421201_01
Preoperative computed tomography scan (a) shows a high-density mass in the third ventricle, which obstructed the foramen Monroe, causing left unilateral hydrocephalus. On MRI, the mass shows high intensity in both T1-weighted images (b) and T2-weighted images (c) and low intensity in susceptibility-weighted images (d), suggesting subacute intralesional hemorrhage. The mass is not enhanced with gadolinium (e: Axial, f: Coronal image)
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F1
Computed tomography (CT) indicated a high-density mass located in the third ventricle that caused left unilateral hydrocephalus due to obstruction of the foramen Monroe [Figure 1].
Surgical view shows that a xanthochromic and multilobulated tumor (white asterisk) in the third ventricle, which adhered to the left hypothalamus (black asterisk)
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F2
The mass was removed via a basal interhemispheric translamina terminalis approach [Figure 2].
Photomicrograph of the surgical specimen stained with hematoxylin and eosin shows variant vessels, hematomas, and hemosiderin (a and b). Elastica van Gieson staining shows thin blood vessel walls containing endothelium and a collagenous adventitia (c). CD34-immunoreactivity is identified in the endothelial-like cells (d)
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F3
Histopathological examination indicated that the specimen was composed of variant vessels, hematomas, and hemosiderin according to hematoxylin-eosin staining [Figure 3].
Postoperative T1-weighted images show that the mass is completely excised and that left unilateral hydrocephalus improved
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F4
Postoperative T1WIs showed that the mass was completely excised and that the left unilateral hydrocephalus improved [Figure 4].