case_images: PMC2816349_01
case_images: (A) T1-weighted image shows a huge well-demarcated mass in the right frontal lobe. (B) Many cystic changes of different sizes are observed within the tumor on T2-weighted image. (C) The tumor shows an inhomogenous enhancement.
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case_images: PMC2816349_01_jkms-19-772-g001.jpg
case_images: F1
case_images: Within the tumor there were many cystic changes of different sizes (Fig. 1).
case_images: Well-developed perivascular pseudorosettes are seen throughout the tumor (H&E, x40).
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case_images: PMC2816349_01_jkms-19-772-g002.jpg
case_images: F2
case_images: Perivascular pseudorosettes became prominent in areas where the tumor cells were separated by artifacts (Fig. 2).
case_images: The tumor cells composing perivascular pseudorosettes display short and thick cytoplasmic processes with prominent blunt-ended footplates toward the vessel wall (H&E, x400).
case_images: jkms-19-772-g003.jpg
case_images: PMC2816349_01_jkms-19-772-g003.jpg
case_images: F3
case_images: Cytoplasmic processes were short and thick, of which blunt footplates were attached to the vessels (Fig. 3).
case_images: The fibrovascular stroma frequently shows prominent vascular sclerosis (H&E, x40).
case_images: jkms-19-772-g004.jpg
case_images: PMC2816349_01_jkms-19-772-g004.jpg
case_images: F4
case_images: Vascular hyalinization or sclerosis was observed in some areas, but no endothelial proliferation was found (Fig. 4).
case_images: The broad GFAP-positive glial processes surround blood vessels (x400).
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case_images: PMC2816349_01_jkms-19-772-g005.jpg
case_images: F5
case_images: Cytoplasmic processes of tumor cells composing perivascular pseudorosettes showed strong positive reaction for glial fibrillary acidic protein (GFAP) (Fig. 5).
case_images: The tumor cells are positive for S-100 protein (A), vimentin (B), and CAM 5.2 (C) (x200).
case_images: jkms-19-772-g006.jpg
case_images: PMC2816349_01_jkms-19-772-g006.jpg
case_images: F6
case_images: The tumor cells showed diffuse strong positivity for S-100 protein, vimentin and neuron specific enolase (NSE), and focal positivity for epithelial membrane antigen (EMA) and CAM 5.2 (Fig. 6).