Choroid plexus malignancy

Choroid plexus malignancies 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)
  • intraventricular meningioma
• Secondary tumors
  • choroid plexus metastases

The distribution of tumors matches the distribution of choroid:

• lateral ventricle: 50%
• fourth ventricle: 40%
• third ventricle: 5%
• multicentric: 5%