hemispherotomy
A modified surgical procedure that functionally disconnects one cerebral hemisphere while preserving brain tissue.
Full Definition
Hemispherotomy is a neurosurgical technique that achieves functional disconnection of one cerebral hemisphere without removing large amounts of brain tissue, unlike traditional hemispherectomy. The procedure involves strategic disconnection of key white matter tracts and structures while leaving most of the hemisphere in place. This approach reduces complications such as hydrocephalus and superficial cerebral hemosiderosis while maintaining seizure control efficacy. It is typically performed for medically refractory epilepsy arising from one hemisphere in cases of extensive unilateral brain damage.
Usage
Usage note: Distinguish from hemispherectomy, which involves tissue removal; hemispherotomy preserves tissue while achieving disconnection.
In Context
- "Hemispherotomy was recommended as a less invasive alternative to anatomical hemispherectomy." — Surgical planning conference
- "Post-hemispherotomy imaging showed successful disconnection with preserved brain volume." — Postoperative radiology report