choroidal fissure approach
A minimally invasive neurosurgical technique for accessing intraventricular tumors through the natural choroidal fissure, minimizing brain parenchymal damage.
Full Definition
The choroidal fissure approach is a sophisticated neurosurgical technique used to access tumors located within the ventricular system, particularly those in the atrium, trigone, or temporal horn of the lateral ventricles. This approach utilizes the natural anatomical plane of the choroidal fissure, which lies between the fornix and the choroid plexus, allowing surgeons to reach intraventricular lesions without transgressing normal brain parenchyma. The technique is particularly valuable for removing tumors such as choroid plexus papillomas, intraventricular meningiomas, and ependymomas while preserving critical structures like the fornix and minimizing postoperative neurological deficits. Successful execution requires detailed knowledge of microsurgical anatomy and careful preservation of the choroidal arteries.
Usage
Usage note: Highly specialized technique; requires specific microsurgical expertise.
In Context
- "The choroidal fissure approach was selected to minimize eloquent cortex manipulation while accessing the intraventricular meningioma." — Surgical planning note
- "Using the choroidal fissure approach, complete tumor resection was achieved without postoperative memory deficits." — Operative report