医学影像英语每日读丨73.Choroid Plexus Papilloma（张恒老师领读）
每天朗读一段医学影像学英语文章
朗读者：张恒老师领读
Notes:
1. dizziness [ˈdɪzɪnəs] n. 头昏眼花
2. ventricle [ˈvɛntrɪkəl] n. 室，脑室，心室
3. heterogeneous [ˌhɛtərəˈdʒiniəs, -ˈdʒinjəs] adj. 各种各样的; 成分混杂的
4. Choroid plexus papilloma [ˈkɔrˌɔɪd ˈplɛksəs ˌpæpəˈlomə] 脉络丛乳头状瘤
5. pediatric [ˌpi:dɪ'ætrɪk] adj. 小儿科的
6. epithelium [ˌepə'θi:lɪrm] n. 上皮，上皮细胞
7. hydrocephalus ['haɪdrə'sefələs] n. 脑水肿，脑积水，患脑积水的
8. calcification [ˌkælsɪfɪ'keɪʃn] n. 钙化
9. ependymomas [epen·dy·mo·ma] 室管膜瘤
10. CSF=Cerebro-Spinal Fluid 脑脊液
11. neuroaxis 神经轴（brain and spine）
A 53-year-old woman presents complaining of progressively worsening dizziness. MRI demonstrates a T2-hyperintense, T1-hypointense mass within the fourth ventricle that does not exhibit restricted diffusion and shows somewhat heterogeneous enhancement.
Diagnosis: Choroid plexus papilloma (determined patholgically after surgical excision)
Choroid plexus neoplasms account for approximately 2% to 4% of pediatric brain tumors but approximately 20% of brain tumors occurring in the first year of life. In adults, these tumors are somewhat less common, comprising approximately 0.5% of adult brain tumors.
Choroid plexus neoplasms occur anywhere that choroid plexus occurs, developing from the choroid plexus epithelium. In the pediatric population, over 80% of these neoplasms occur in the lateral ventricles, whereas in adults the majority occur in the fourth ventricle. Patients with choroid plexus neoplasms most often present with signs of obstructive hydrocephalus.
The appearance of choroid plexus papillomas can be variable due to the potential presence of calcification, cystic components, and/or blood products. CPPs with a large amount of cystic component will be T2-hyperintense, whereas those with large amounts of calcification or blood products will be T2-hypointense. CPPs may enhance avidly or heterogeneously. There are no definite imaging features distinguishing choroid plexus papillomas from choroid plexus carcinomas.
Additionally, ependymomas and CPPs in the fourth ventricle can be similar in appearance. Of note, all choroid plexus neoplasms can have CSF spread, so imaging of the entire neuroaxis is recommended.
来源：每天朗读一段医学影像学英语文章