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. 2019 Jan-Mar;14(1):15–27. doi: 10.4103/ajns.AJNS_158_18

Table 4.

Safe entry zones and surgical approaches to pons

Location Craniotomy Surgical approach Safe entry zone
Ventrolateral Retrosigmoid A paratrigeminal area located medially to CN V and laterally to the pyramidal tract
Subtemporal transtentorial Transpetrosal
Presigmoid
Dorsal Midline Telovelo tonsillar The median sulcus above the facial colliculus, The suprafacial triangle The infrafacial triangles
Suboccipital Vermian split

CN – Cranial nerve