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OBJECTIVE To summarize the clinical, video electroencephalogram (VEEG), radiological and pathological features of 3 patients of temporal lobe epilepsy (TLE) with amygdala enlargement (AE). METHODS Three TLE patients with AE who were hospitalized in Peking University International Hospital were collected. The above features were retrospectively analyzed, and the amygdala volume was measured as well. RESULTS Of all the 3 patients, 2 were females and 1 male, whose seizure onset ages varied from 21 to 40 years. Two cases presented with secondarily generalized tonicclonic seizures after falling asleep during the night. One of the 2 cases had complex partial seizures (CPSs) with episodic memory and automatism after one year, and the third one had CPSs with lip smacking and tongue wagging during the night. All the patients suffered from obvious anxious disorder. Unilateral AE by MRI was demonstrated in the 3 cases, one on the right side, and the other two on the left side. The average amygdala volume of the enlarged side and the other side were (2 123.7±131.8) mm3 and (1 276.3±156.9) mm3, respectively. Unilateral interictal epileptic discharges were ipsilateral to the AE in 2 cases, while the other patient showed bilateral interictal epileptic discharges. The ictal VEEG showed that the seizure onset zone was ipsilateral to the AE and was confined to the anterior and middle temporal regions in the 3 patients. The interictal single-photon emission computed tomography (SPECT) was negative in 2 cases. The interictal positron emission tomography (PET) showed hypometabolism in the AE in one case. The histological pathology revealed focal cortical dysplasia in the amygdala and temporal lobe in the 3 cases, and one of the 3 cases was combined with hippocampal sclerosis. All the patients became seizure free after surgery in the half year following-up. VEEG revealed slow wave activity and occasional spike wave in the operated side. CONCLUSIONS AE may be one subtype of TLE. It is necessary to recognize AE in TLE with MRI-negative. For those poorly responsive to antiepileptic drugs, surgical treatment could provide a better solution. Focal cortical dysplasia may be one of the most common pathological features of TLE with AE.
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