suboccipital craniotomy
A posterior fossa surgical approach through the occiput to access the cerebellum, brainstem, and fourth ventricle.
Full Definition
A suboccipital craniotomy is a neurosurgical approach that provides access to the posterior fossa structures, including the cerebellum, brainstem, cerebellopontine angle, and fourth ventricle. The procedure involves removing a portion of the occipital bone below the transverse sinuses, typically in the midline or paramedian position. This approach is commonly used for resection of posterior fossa tumors, vascular malformations, and decompression procedures for Chiari malformations. The surgery can be performed in sitting, prone, or lateral positions, each with specific advantages and considerations. Careful attention to venous air embolism risk and cranial nerve preservation is essential given the critical structures in this region.
Usage
Usage note: Specify midline versus lateral suboccipital approaches when relevant.
In Context
- "A midline suboccipital craniotomy was performed for resection of the fourth ventricular tumor." — Operative report
- "The suboccipital craniotomy provided excellent exposure of the cerebellar hemispheres." — Surgical case review