Statistical shape analysis of temporal lobe in mesial temporal sclerosis patients.
BACKGROUND
Surgery is regarded as a common treatment option for patients with mesial temporal lobe epilepsy due to hippocampal sclerosis but sometimes deciding this diagnosis can be very difficult. We aim to investigate the shape differences in the temporal lobe of mesial temporal sclerosis epilepsy patients compared with healthy controls, investigating the side difference and, if present, assessing the clinical application of this situation.


METHODS
The MRI scans of mesial TLE patients and controls were retrospectively reviewed. Temporal lobe data were collected from the two-dimensional digital images. Standard anthropometric landmarks were selected and marked on each digital image using TPSDIG 2.04 software. Eight anatomic landmarks were marked on images. A generalized Procrustes analysis was used to evaluate the shape difference. The shape deformation of the temporal lobe from control to patient was evaluated using the TPS method.


RESULTS
There were statistically significant TL shape differences between groups. High level deformations for the left and right side from the control to patient group were seen in the TPS graphic. The highest deformation was determined at the inferior lateral temporal midpoint of the middle temporal gyri and superior temporal landmark points of both the right and left sides.


CONCLUSIONS
Our study for the first time demonstrated temporal shape differences in TLE patients using a landmark-based geometrical morphometric method by taking into consideration the topographic distribution of TL.
Department of Biostatistics, Faculty of Medicine, Uludag University, Bursa, Turkey. ocakoglu@uludag.edu.tr.
Gokhan
G
Ocakoglu
Department of Neurosurgery, Faculty of Medicine, Uludag University, Bursa, Turkey.
M Ozgur
MO
Taskapilioglu
Department of Biostatistics, Faculty of Medicine, Uludag University, Bursa, Turkey.
Ilker
I
Ercan
Department of Neurology, Faculty of Medicine, Uludag University, Bursa, Turkey.
Aylin Bican
AB
Demir
Department of Radiology, Faculty of Medicine, Uludag University, Bursa, Turkey.
Bahattin
B
Hakyemez
Department of Neurosurgery, Faculty of Medicine, Uludag University, Bursa, Turkey.
Ahmet
A
Bekar
Department of Neurology, Faculty of Medicine, Uludag University, Bursa, Turkey.
Ibrahim
I
Bora
D000293:Adolescent; D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D003627:Data Interpretation, Statistical; D004833:Epilepsy, Temporal Lobe / Q000473:pathology*; D005260:Female; D006624:Hippocampus / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012598:Sclerosis; D013702:Temporal Lobe / Q000473:pathology*
Epilepsy; Hippocampal sclerosis; Mesial temporal lobe; Statistical shape analysis