The transventricular approach through a transcortical approach or a transcallosal approach allows access to the third ventricle with transforaminal, subchoroidal, or transfornician approaches. The usefulness of these approaches have been reported for intraventricular tumor removal 1) 2) 3) 4) but there is a risk of injuries to the surrounding neuronal or vascular structures, such as the body of the fornix.

In 1958, Niemeyer described a more selective approach to the hippocampus and amygdala through the middle temporal gyrus 5).

Chamoun R, Couldwell WT. Transcortical-transforaminal microscopic approach for purely intraventricular craniopharyngioma. Neurosurg Focus. 2013;34(1 Suppl) Video 4.
Danaila L, Radoi M. Surgery of tumors of the third ventricle region. Chirurgia (Bucar) 2013;108:456–62.
Liu JK. Interhemispheric transcallosal approach for resection of intraventricular central neurocytoma. Neurosurg Focus. 2013;34(1 Suppl) Video 3
Tomasello F, Cardali S, Angileri FF, Conti A. Transcallosal approach to third ventricle tumors: How I do it. Acta Neurochir. 2013;155:1031–4
Niemeyer P, Baldwin M, Bailey P. The transventricular amygdala-hippocampectomy in temporal lobe epilepsy. In: Temporal Lobe Epilepsy. Springfield: Charles C Thomas; 1958:461–482
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