病史
A 33-year-old woman with headache, right upper quadrant visual cut, and difficulty reading
33岁女性，头痛、右上方视野缺损、阅读困难。
Reticulin staining (C) is more consistent with schwannoma than either meningioma or ependymoma. Reticulin staining was found to be strong in greater than 50% of the tumor.
网状细胞染色考虑许旺氏细胞瘤可能性大于脑膜瘤或室管膜瘤，超过50%的许旺氏细胞瘤在网状细胞染色时可见胞质淡染。
Vimentin staining (D) is somewhat less likely to be positive in an ependymoma.
波形蛋白染色也不符合室管膜瘤。
- Schwannomas are benign nerve sheath tumors that are often found in extra-axial locations and commonly involve the eight cranial nerve.神经鞘瘤是起源于神经鞘的良性肿瘤，通常位于脑外，易累及第8颅神经。
- Intraventricular schwannomas, however, are exceedingly rare.脑室神经鞘瘤特别罕见。
- Of the few cases of intraventricular schwannomas, it is noted that they present earlier in life.仅有的几例脑室神经鞘瘤都发生于年轻人。
- No defining characteristic is noted of an intraventricular schwannoma on radiologic evaluation.脑室神经鞘瘤影像学检查缺乏特征性表现。
- It may be cystic in nature and may present with calcifications or perilesional edema and gliosis.病灶可囊变、钙化，瘤周可见水肿及胶质增生。
- It may enhance homogeneously or in-homogeneously post contrast administration.增强扫描可以均匀或不均匀强化。
- Meningiomas脑膜瘤
- Choroid plexus papillomas or carcinomas脉络丛乳头状瘤/癌
- Ependymomas室管膜瘤