Choroid plexus tumor

Choroid plexus tumors are a rare type of cancer that occur in the choroid plexus of the brain. These tumors usually occur in children younger than 2 years and are classified according to the WHO classification of the tumors of the central nervous system:
 * Choroid plexus carcinoma (WHO grade III)
 * Choroid atypical plexus papilloma (WHO grade II)
 * Choroid plexus papilloma (WHO grade I)