Intra-ventricular masses
Adults:
- Ependymoma
- Posterior fossa more common in children; supratentorial more common in adults
- Associated with NF2
- CT: coarse calcification, cystic areas, heterogenous enhancement
- MRI: T1 iso- to hypo-, T2 hyper-, SWI blooming, diffusion restriction, heterogenous enhancement
- Sub-ependymoma
- Older patients
- CT: similar to ependymoma except usually no enhancement
- MRI: similar to ependymoma except usually no enhancement or diffusion restriction.
- Meningioma
- Metastases
- RCC, melanoma, breast, lung, papillary thyroid primaries.
- Colloid cyst
Children:
- Ependymoma (see above)
- Choroid plexus papilloma
- Lateral ventricles children; 4th ventricle adults
- CT: lobulated and frond-like appearance, hyperdense, homogenous enhancement
- MRI: T1 iso, T2 iso- to hyper-, vivid homogenous enhancement
- Choroid plexus carcinoma
- Similar to above except may show parenchymal invasion and heterogenous contrast-enhancement.
- Teratoma
- Atypical Rhabdoid tumour
Other:
- Sub-ependymal giant cell astrocytoma (SEGA)
- Associated with tuberous sclerosis
- Mass near foramen of Munro
- Calcification common, marked contrast-enhancement.
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