Multiple sclerosis (MS) and epilepsy are common disorders, the co-occurrence of which has been of considerable interest. This study aimed to evaluate the prevalence and clinical features of epileptic seizures in patients with definite MS including those with pediatric onset (≤16 years of age). Out of 2,300 patients with definite MS followed in our outpatient clinic, 36 with epileptic seizures were identified. In this cohort, 8 out of 146 pediatric cases had seizures. The clinical and demographic features of the patients were recorded. Multiple logistic regression model with the occurence of seizures as the dependent variable was performed to identify the risk factors for seizure occurrence in MS patients. The prevalence of epileptic seizures was 1.5% in definite MS patients, 1.3% in adult-onset (comparable to seizure prevalence in the general population) and 5.5% in pediatric MS patients (≤16 years old). Twenty-six of 36 (72%) patients with MS and epilepsy developed recurrent seizures after the first epileptic seizure. Mean annual relapse rate (p ≤ 0.001), mean expanded disability status scale (EDSS) score (p = 0.004) and the ratio of patients with pediatric onset (p = 0.01) were higher in MS patients with seizures. In the multiple logistic regression analysis, age at MS onset and EDSS at the last examination were found to be predictors of seizure occurrence. Occurrence of seizures during the clinical course of MS appears to be associated with early-onset and increased disease severity and might be coincidental in adults.

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Introduction: To investigate the prevalence and characteristics of Restless Legs Syndrome (RLS) in patients with Behçet's Disease (BD) and Multiple Sclerosis (MS).Methods: Consecutive patients with BD and MS seen in the outpatient clinic were included in the study. As a control group, volunteer subjects without a known peripheral or central nervous system disorder were included. The BD group was divided into two sub-groups as BD with neurological involvement [Neuro-Behçet' s Disease (NBD)] and BD without any neurological involvement (other BD) for further evaluation. Data on demographic characteristics, medical history and family history were collected, and all patients underwent neurological examination. The patients were evaluated for the presence of diagnostic criteria for RLS. The features and severity of RLS were evaluated in patients with RLS using Restless Legs Syndrome Identification Form, and the International Restless Legs Syndrome Study Group (IRLSSG) Rating Scale. The clinical and radiological findings of patients with BD and MS were retrieved from their medical files. Results:The study included a total of 96 patients with BD (mean age 39.9±11.8; 51 males; 41 patients with NBD) and 97 patients with MS (mean age 34.97±4.1 years; 24 males). There were 100 healthy control subjects (mean age 36.18±11.10 years; 46 males). RLS was more prevalent in MS (22.8%) and NBD (22%) groups compared to the control group (10%; p=0.004 and 0.029, respectively) with a statistically significant difference. The prevalence of RLS was higher in MS patients with less disability. Most severe RLS symptoms were observed in the MS group. The rate of sleep disorders was also higher in MS group. Although stress appeared to be a factor worsening RLS in all groups, its prevalence was higher in the MS group (p=0.011). There was no correlation between the distribution of magnetic resonance imaging lesions and RLS in both MS and NBD groups.Conclusions: It is well established that RLS can accompany disorders involving the peripheral and central nervous systems such as all types of peripheral neuropathy, myelopathy, and Parkinson's disease. The present study showed that MS and NBD also seem to be a risk factor for RLS, being associated with more severe symptoms.