Choroid plexus neoplasms
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Choroid plexus tumors can be classified as primary or secondary neoplasms of the choroid plexus:
- primary tumors
- choroid plexus papilloma (WHO grade I or II "atypical")
- choroid plexus carcinoma (WHO Grade III)
- choroid plexus xanthogranuloma
- intraventricular meningioma
- secondary tumors
The distribution of tumors matches the distribution of choroid:
- lateral ventricle: 50%
- fourth ventricle: 40%
- third ventricle: 5%
- multicentric: 5%