Table 4. Indications for surgery^{6,7,8,17,57,58,59,60}.

Type of lesion	Surgical Indication	Surgical intervention	Success	Complications	Recommendations
Small and asymptomatic	- Predictable tumor growth - Ventricles enlargement	Complete resection	Good-excellent	-	-
• Infiltrative lesion	-	Unsafe Gross total excision	-	-	Observe the progression of the residual tumor
• Intraventricular lesions in the region of the foramen of Monro	-	Transcortical, transventricular and transcallosal interhemispheric1	-	Intralesional hemorrhage resulting acute obstructive hydrocephalus and sudden death	Early surgery for small asymptomatic lesions identified by neuroimaging supervision
• Unilateral obstructive hydrocephalus	-	Contralateral approach fenestration of septum pellucidum and transseptal tumor resection facilitating direct trajectory to the lesion and septosomy2	-	-	Endoscopic procedures are paving new path for ventricular surgery where small ventricles are also approachable Invasive endoscopic resection is being adopted for cystic intraventricular lesions and endoscopic resection for lesions of diameter ≤2 cm Other than manually surgery procedure, Gamma knife radiosurgery can also be used in surgical therapy
Large and symptomatic	- Early symptoms include restrained behavioural changes or worsening of seizures - Later symptoms include increased intracranial pressure	Complete resection	66%	Tumor regrowth 34% and postsurgical complications 49%	Regular neuroimaging monitoring is required