PubMed · 13586563
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M BONDUELLE, C SALLOU. 1958-09-25. [Digestive epilepsy].. https://pubmed.ncbi.nlm.nih.gov/13586563/
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PURPOSE: Determining the existence of syndrome-specific genetic factors in epilepsy is essential for phenotype definition in genetic linkage studies, and informs research on basic mechanisms. Analysis of concordance of epilepsy syndromes in families has been used to assess shared versus distinct genetic influences on generalized epilepsy (GE) and localization-related epilepsy (LRE). However, it is unclear how the results should be interpreted in relation to specific genetic hypotheses. METHODS: To assess evidence for distinct genetic influences on GE and LRE, we examined concordance of GE and LRE in 63 families containing multiple individuals with idiopathic or cryptogenic epilepsy, drawn from the Epilepsy Family Study of Columbia University. To control for the number of concordant families expected by chance, we used a permutation test to compare the observed number with the number expected from the distribution of individuals with GE and LRE in the study families. RESULTS: Of the families, 62% were concordant for epilepsy type, and 38% were discordant. In all analyses, the proportion of concordant families was significantly greater than expected. CONCLUSIONS: This suggests that some genetic influences predispose specifically to either GE or LRE. Because of the ascertainment bias resulting from the selection of families containing multiple individuals with epilepsy, we could not test whether there are also shared genetic influences on these two epilepsy subtypes. Population-based studies will be needed to explore these results further.
Two infants with severe drug refractory focal epilepsy caused by Sturge-Weber syndrome and extensive cerebral leptomeningeal angiomatosis were referred for preoperative video-electroencephalographic evaluation. Brain imaging with computed tomography and gadolinium-enhanced magnetic resonance imaging demonstrated bilateral disease in both children with a predominance of involvement of one hemisphere. Clinical examination and neurophysiology with ictal video recording demonstrated epileptogenesis from one hemisphere. Successful surgical treatment with functional hemispherectomy was followed by good long-term seizure control in both patients. The dramatic seizure control was accompanied by markedly improved quality of life for the family and children. These cases indicate that the spectrum of children that may benefit from epilepsy surgery should not be viewed too restrictively, and subsets of children with localization related epilepsy caused by extensive lesions may be resective surgical candidates with a good seizure outcome prognosis.
PURPOSE: Because the number and variety of patients at any single facility is not sufficient for clinical or statistical analysis, data from six major epilepsy centers that performed multiple subpial transections (MSTs) for medically intractable epilepsy were collected. METHODS: A meta-analysis was performed to elucidate the indications and outcome, and to assess the results of the procedure. Overall, 211 patients were represented with data regarding preoperative evaluation, procedures, seizure types and frequencies before and after surgery, postoperative deficits, and demographic information. Fifty-three patients underwent MST without resection. RESULTS: In patients with MST plus resection, excellent outcome (>95% reduction in seizure frequency) was obtained in 87% of patients for generalized seizures, 68% for complex partial seizures, and 68% for simple partial seizures. For the patients who underwent MST without resection, the rate of excellent outcome was only slightly lower, at 71% for generalized, 62% for complex partial, and 63% for simple partial seizures. EEG localization, age at epilepsy onset, duration of epilepsy, and location of MST were not significant predictors of outcome for any kinds of seizures after MST, with or without resection. New neurologic deficits were found in 47 patients overall, comparable in MST with resection (23%) or without (19%). CONCLUSIONS: These preliminary results suggest that MST has efficacy by itself, with minimal neurologic compromise, in cases in which resective surgery cannot be used to treat uncontrolled epilepsy. MST should be investigated as a stand-alone procedure to allow further development of criteria and predictive factors for outcome.