Case
About this case
Operative video: Cavernous Malformation of the Brainstem, through the Retrosigmoid (Suboccipital) approach. The background notes below summarise the anatomy, pathology and approach, with published references.
Reference notes
Background
Notes on this case’s cranial location, pathology and surgical approach, with published sources. General education only, not advice for any individual patient.
Cranial Location
Brainstem
The brainstem — midbrain, pons and medulla — is densely packed with cranial-nerve nuclei, ascending and descending long tracts, and the reticular formation, leaving almost no forgiving tissue. Intrinsic lesions are entered through “safe entry zones,” relatively silent corridors mapped between eloquent structures on the pial surface.
Surgery here is reserved for lesions that reach the surface or are symptomatic, such as cavernous malformations and focal gliomas. Outcomes hinge on trajectory selection and meticulous, tract-sparing technique, usually with intraoperative neurophysiological monitoring.
