VISUAL FIELD DEFICITS IN STANDARD TEMPORAL LOBECTOMY AND SELECTIVE AMYGDALOHIPPOCAMPECTOMY
Abstract number :
2.451
Submission category :
Year :
2005
Submission ID :
5758
Source :
www.aesnet.org
Presentation date :
12/3/2005 12:00:00 AM
Published date :
Dec 2, 2005, 06:00 AM
Authors :
Neelan Pillay, Walter Hader, Terry Myles, and Jackie Martini
To determine the frequency and severity of visual field deficits (VFD) after standard anterior temporal lobectomy (ATL) and selective amygdalohippocampectomy (SAH). Patients with intractable temporal lobe epilepsy had either transcortical SAH for mesial temporal sclerosis or lesions in the medial temporal lobe or ATL extending to 4.5cm on the dominant temporal lobe and 6 cm on the non-dominnt temporal lobe for non-lesional or neocortical temporal lesions. Goldmann visual field perimetry (GVFP) was performed in all patients after a minimum of 2 months after surgery. Twenty had SAH and 23 had ATL. No patient had functional visual impairment. VFD were present on clinical examination in 19% (8/43) and on GVFP in 81% (35/43). In the 8 patients with clinical VFD, 6 had ATL. Eleven of the 14 with VFD within 10 degrees of central vision were in patients who had ATL. Formal visual fields are common after temporal lobe epilepsy surgery.
They are much less commonly demonstrated on clinical visual field testing.
Visual field deficits are less common and less severe in selective versus standard temporal lobe resections.
Visual field deficits rarely cause functional visual impairment.