Table 3.

Summary of key imaging features of pineal region and choroid plexus tumors.

Tumor Type	Common Location	Key MRI Features
Pineal region tumors
Pineoblastoma	Pineal region	Heterogenous, ‘explode’ pineal calcification Diffusion restricting Enhancement variable
Germ cell tumor	Pineal and/or suprasellar region	Heterogenous, usually calcified, ‘engulf’ pineal calcification Diffusion restricting Enhancement usually present
Choroid plexus tumors
Choroid plexus papilloma	Lateral ventricle followed by fourth ventricle	Lobular or papillary lesions Diffuse enhancement No diffusion restriction High myo-inositol, low creatine, moderate choline on MRS
Choroid plexus carcinoma	Lateral ventricle	More heterogenous than papillomas Parenchymal invasion/edema May have diffusion restriction Moderate myo-inositol and high choline on MRS