case_images: PMC3198666_01
case_images: Preoperative T1 weighted image MRI, axial plain, showing a round isointense mass in a location typical for a colloid cyst (a), T2 weighted image MRI, sagital (b) and coronal (c) plain.
case_images: AJNS-5-83-g001.jpg
case_images: PMC3198666_01_AJNS-5-83-g001.jpg
case_images: F1
case_images: CT and MRI have shown a 15 mm mass of the third ventricle which was isointense in both T1 and T2 images (fig. 1).
case_images: Postoperative T1 weighted image MRI, sagital plain, showing the total removal of the mass via the transcallosal approach (a), T2 weighted image MRI, axial plain (b)
case_images: AJNS-5-83-g002.jpg
case_images: PMC3198666_01_AJNS-5-83-g002.jpg
case_images: F2
case_images: Follow-up MRI two months postoperatively have shown a radical removal of the tumour and a resolution of hydrocephalus (fig. 2).
case_images: (a) Hematoxylin-Eosin (HE), 100x. Typical palisading of neoplastic cell nuclei in Verocay body in cellular Antoni A area. (b) HE, 200x. Detail of Verocay body with palisading nuclei. (c) Ki-67, 200x. Proliferative marker Ki-67 is showing a minimal activity (sporadic positive brown nuclei), (d) S-100, 200x: Partial positivity (brown) of neoplastic cells on marker S-100
case_images: AJNS-5-83-g003.jpg
case_images: PMC3198666_01_AJNS-5-83-g003.jpg
case_images: F3
case_images: Histologically intraventricular schwannoma WHO GrI was confirmed (fig. 3).