Most common tumors based on age and location (1, 2, 4, 5, 12, 21)

	Frontal Horn	Foramen of Monro	Body	Trigone
Children (<10 yrs)	PNET	SEGA	PNET	CPP
	SEGA			CPC
Adults (10 to 30–40 yrs)	Astrocytoma	Colloid Cyst	Astrocytoma	Astrocytoma
	Central Neurocytoma	SEGA	GBM	Ependymoma
			Ependymoma	Meningioma
			Oligodendroglioma
			Central Neurocytoma
Adults (>30–40 yrs)	Central Neurocytoma	Colloid Cyst	GBM	Meningioma
	Subependymoma	Subependymoma	Subependymoma
			Metastasis

Note.—PNET indicates primitive neuroectodermal tumor; SEGA, subependymal giant cell astrocytoma; CPP, choroid plexus papilloma; CPC, choroid plexus carcinoma; and GBM, glioblastoma multiforme.