Regional hippocampal involvement and cognitive impairment in pediatric multiple sclerosis

Maria Assunta Rocca, Maria E. Morelli, Maria Pia Amato, Lucia Moiola, A. Ghezzi, Pierangelo Veggiotti, R. Capra, E. Pagani, E. Portaccio, A. Fiorino, Lorena Pippolo, Maria Carmela Pera, Giancarlo Comi, Andrea Falini, Massimo Filippi

Research output: Contribution to journalArticle

Abstract

Objectives: We assessed global and regional hippocampal volume abnormalities in pediatric multiple sclerosis (MS) patients and their correlations with clinical, neuropsychological and magnetic resonance imaging metrics. Methods: From 53 pediatric MS patients and 18 healthy controls, global hippocampal volume was computed using a manual tracing procedure. Regional hippocampal volume modifications were assessed using a radial mapping analysis. MS patients with abnormal performance in three or more tests of a neuropsychological battery for children were classified as cognitively impaired. Results: Global hippocampal volume was reduced in MS patients compared with controls, but did not correlate with clinical, neuropsychological and magnetic resonance imaging measures. Compared to controls, MS patients experienced bilateral radial atrophy of the cornu ammonis, subiculum and dentate gyrus subfields as well as radial hypertrophy of the dentate gyrus subfield. Regional hippocampal volume modifications correlated with brain T2 lesion volume as well as attention and language abilities. Global hippocampal volume did not differ between cognitively impaired (n=12) and cognitively preserved MS patients. Compared to cognitively preserved, cognitively impaired MS patients had atrophy of the subiculum and dentate gyrus subfields of the right hippocampus. Conclusions: Hippocampal subregions have different vulnerability to damage in pediatric MS. Regional rather than global hippocampal involvement contributes to global cognitive impairment as well as to deficits of selected cognitive tests.

Original languageEnglish
Pages (from-to)628-640
Number of pages13
JournalMultiple Sclerosis
Volume22
Issue number5
DOIs
Publication statusPublished - Apr 1 2016

Keywords

  • cognition
  • Hippocampus
  • magnetic resonance imaging
  • pediatric multiple sclerosis
  • radial mapping

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology

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  • Cite this

    Rocca, M. A., Morelli, M. E., Amato, M. P., Moiola, L., Ghezzi, A., Veggiotti, P., Capra, R., Pagani, E., Portaccio, E., Fiorino, A., Pippolo, L., Pera, M. C., Comi, G., Falini, A., & Filippi, M. (2016). Regional hippocampal involvement and cognitive impairment in pediatric multiple sclerosis. Multiple Sclerosis, 22(5), 628-640. https://doi.org/10.1177/1352458515598569