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Epilepsy Outcomes and Hippocampal Volumes in Children with Multiple Parenchymal Neurocysticercoses

Background: We aimed to study the radiological and epilepsy outcomes of children with multiple neurocysticercosis (NCC) and the relationship with hippocampus volume. Study Design: Observational study. Materials and Methods: Children between 5 and 18 years of age with NCC lesions and completed more than 2-year follow-up were enrolled. Magnetic resonance imaging (MRI) brain with a predefined protocol was done as per clinical indication, and bilateral hippocampi volume was measured with a region of interest-based manual method. Proportion of children who had radiological resolution of lesions, proportion of children who were seizure-free for at least 3 months after antiepileptic drugs withdrawal, and mean hippocampi volume were calculated. Results: During the study period, 229 children followed up in pediatric NCC clinic were enrolled, the mean age was 10.5 ± 3 years, and 129 (56%) were boys. A total of 159 (65%) children had single-lesion NCC, and 79 (35%) had multiple lesion (> 2) NCC. Resolution of lesions was seen in 8% children with multiple NCC, significantly less as compared to the single NCC group (8% vs. 27%, P = 0.006). Multiple-lesion NCC group had a higher rate of calcification as compared to children with a single lesion (66% vs. 47%, P = 0.008). Twenty-nine (37%) children with multiple-lesion NCC were seizure free for at least 3 months after antiepileptic drug withdrawal. Mean combined hippocampal volume in children with single-lesion NCC was 2.96 (0.62) mL and multiple-lesion NCC was 2.88(0.43) mL. Conclusion: Children with multiple-lesion NCC have lower resolution, and higher calcification during follow-up in comparison to single-lesion NCC. Frequency of children who remained seizure-free 3-month post AED withdrawal was similar in single- and multiple-lesion groups.