Eyes on MEGDEL: Distinctive basal ganglia involvement in dystonia deafness syndrome

Saskia B. Wortmann, Peter M. Van Hasselt, Ivo Barić, Alberto Burlina, Niklas Darin, Friederike Hörster, Mahmut Coker, Sema Kalkan Ucar, Zita Krumina, Karin Naess, Lock H. Ngu, Ewa Pronicka, Gilian Riordan, Rene Santer, Evangeline Wassmer, Johannes Zschocke, Manuel Schiff, Linda De Meirleir, Mohammed A. Alowain, Jan A.M. SmeitinkEva Morava, Tamas Kozicz, Ron A. Wevers, Nicole I. Wolf, Michel A. Willemsen

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Pediatric movement disorders are still a diagnostic challenge, as many patients remain without a (genetic) diagnosis. Magnetic resonance imaging (MRI) pattern recognition can lead to the diagnosis. MEGDEL syndrome (3-MethylGlutaconic aciduria, Deafness, Encephalopathy, Leigh-like syndrome MIM #614739) is a clinically and biochemically highly distinctive dystonia deafness syndrome accompanied by 3-methylglutaconic aciduria, severe developmental delay, and progressive spasticity. Mutations are found in SERAC1, encoding a phosphatidylglycerol remodeling enzyme essential for both mitochondrial function and intracellular cholesterol trafficking. Based on the homogenous phenotype, we hypothesized an accordingly characteristic MRI pattern. A total of 43 complete MRI studies of 30 patients were systematically reevaluated. All patients presented a distinctive brain MRI pattern with five characteristic disease stages affecting the basal ganglia, especially the putamen. In stage 1, T2 signal changes of the pallidum are present. In stage 2, swelling of the putamen and caudate nucleus is seen. The dorsal putamen contains an eye that shows no signal alteration and (thus) seems to be spared during this stage of the disease. It later increases, reflecting progressive putaminal involvement. This eye was found in all patients with MEGDEL syndrome during a specific age range, and has not been reported in other disorders, making it pathognomonic for MEDGEL and allowing diagnosis based on MRI findings.

Original languageEnglish (US)
Pages (from-to)98-103
Number of pages6
Issue number2
StatePublished - Feb 4 2015


  • 3-methylglutaconic aciduria
  • Leigh syndrome
  • MEGDEL syndrome
  • SERAC1
  • basal ganglia involvement
  • putamen

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Clinical Neurology


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