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  • Title: Significance of tuber size for complications of tuberous sclerosis complex.
    Author: Pascual-Castroviejo I, Hernández-Moneo JL, Pascual-Pascual SI, Viaño J, Gutiérrez-Molina M, Velazquez-Fragua R, Quiñones Tapia D, Morales Bastos C.
    Journal: Neurologia; 2013; 28(9):550-7. PubMed ID: 23274119.
    Abstract:
    INTRODUCTION: Tuberous sclerosis complex (TSC) is one of the most frequent neurocutaneous disorders. Cortical tubers are the most common pathological changes in TSC and they are directly related to the disease's main clinical manifestations: seizures, mental retardation, and autistic behaviour. OBJECTIVE: The aim of this study is to establish a correlation between tuber size and the severity of clinical features in TSC. MATERIAL AND METHODS: We performed a retrospective study of the clinical and imaging findings from 45 TSC patients (22 females and 23 males) and compared the clinical features with the location, size, and number of the cortical tubers in each patient. RESULTS: Four patients had voluminous tubers located in 1 or both cerebral hemispheres. All of these patients had intractable seizures and severe mental retardation; 3 of these cases also presented with autistic behaviour, despite tubers having been resected in all 4 patients. Thirteen patients had tubers of large-to-average size, and all patients in this group showed intractable seizures and mental retardation. Nine patients who had experienced infantile spasms during the first year of life presented autistic behaviour. Multiple tubers of small to average size were found in 28 patients. In general, this group had seizures that responded well to antiepileptic drugs and a low prevalence of autism. In 3 patients who all presented good seizure control and normal intelligence, single cortical/subcortical tubers were located in the frontal or occipital lobes. Of the total of 45 patients, 13 had cerebellar as well as cerebral tubers; these were generally present in cases with more severe clinical features. CONCLUSIONS: Although large tubers are less common than small to medium-sized ones, they are much more likely to be accompanied by severe clinical symptoms (seizures, mental retardation and autistic behaviour), even when the smaller tubers are quite numerous.
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