Does the co-occurrence of FGFR3 gene mutation in Hypochondroplasia, medial temporal lobe dysgenesis, and focal epilepsy suggest a syndrome?

Antonino Romeo, Monica Lodi, Maurizio Viri, Eliana Parente, Maurizia Baldi, Andrea Righini, Donatella Milani

Research output: Contribution to journalArticle


Background Hypochondroplasia is a rare skeletal dysplasia characterized by disproportionately short stature, lumbar lordosis, and limited extension of the elbow caused by mutations in the fibroblast growth factor receptor 3 (FGFR3) gene that plays a role in controlling nervous system development. Hypochondroplasia with FGFR3 mutation associated with bilateral medial temporal lobe anomalies and focal epilepsy was previously reported in several patients. Patient We report clinical, electroclinical, and neuroradiological findings of one patient affected by hypochondroplasia. Results Clinical diagnosis was confirmed by molecular analysis of the FGFR3 gene, which showed a N540 K mutation. The patient had normal psychomotor development and showed early-onset focal seizures with left temporal localization on interictal and ictal electroencephalograph. The seizures were well controlled, and the patient has been seizure-free since infancy. Magnetic resonance imaging showed abnormal anteriorly posteriorly infolding in the hippocampus and abnormally oriented parahippocampus sulci, and additional cortical rim dysplasia with gray-white matter junction blurring in the hippocampus. Conclusions The present case of hypochondroplasia and FGFR3 mutation in Asn540Lys associated with characteristic abnormalities involving bilaterally medial temporal lobe structures, probable hippocampal cortex focal dysplasia, and early onset of focal epilepsy underscores the possibility of a rare syndrome.

Original languageEnglish
Pages (from-to)427-430
Number of pages4
JournalPediatric Neurology
Issue number4
Publication statusPublished - 2014



  • FGFR3 gene
  • focal dysplasia
  • focal temporal epilepsy
  • hippocampus abnormalities
  • Hypochondroplasia
  • medial temporal lobe dysgenesis

ASJC Scopus subject areas

  • Clinical Neurology
  • Pediatrics, Perinatology, and Child Health
  • Developmental Neuroscience
  • Neurology
  • Medicine(all)

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