Muscle MRI in a large cohort of patients with oculopharyngeal muscular dystrophy

Alicia Alonso-Jimenez, Rosemarie H.M.J.M. Kroon, Aida Alejaldre-Monforte, Claudia Nuñez-Peralta, Corinne G.C. Horlings, Baziel G.M. Van Engelen, Montse Olivé, Laura González, Enric Verges-Gil, Carmen Paradas, Celedonio Márquez, Matteo Garibaldi, Pía Gallano, Maria José Rodriguez, Lidia Gonzalez-Quereda, Cristina Dominguez Gonzalez, John Vissing, Freja Fornander, Anne Sofie Vibæk Eisum, Tania García-SobrinoJulio Pardo, Roberto García-Figueiras, Nuria Muelas, Juan Jesús Vilchez, Solange Kapetanovic, Giorgio Tasca, Mauro Monforte, Enzo Ricci, María Teresa Gomez, Jorge Alfredo Bevilacqua, Jorge Diaz-Jara, Ivonne Ingrid Zamorano, Robert Yves Carlier, Pascal Laforet, Ana Pelayo-Negro, Alba Ramos-Fransi, Amaia Martínez, Chiara Marini-Bettolo, Volker Straub, Gerardo Gutiérrez, María Asunción Martín, Germán Morís, Roberto Fernández-Torrón, Adolfo Lopez De Munaín, Elena Cortes-Vicente, Luis Querol, Ricardo Rojas-García, Isabel Illa, Jordi Diaz-Manera

Research output: Contribution to journalArticlepeer-review

Abstract

Background and objective: Oculopharyngeal muscular dystrophy (OPMD) is a genetic disorder caused by an abnormal expansion of GCN triplets within the PABPN1 gene. Previous descriptions have focused on lower limb muscles in small cohorts of patients with OPMD, but larger imaging studies have not been performed. Previous imaging studies have been too small to be able to correlate imaging findings to genetic and clinical data. Methods: We present cross-sectional, T1-weighted muscle MRI and CT-scan data from 168 patients with genetically confirmed OPMD. We have analysed the pattern of muscle involvement in the disease using hierarchical analysis and presented it as heatmaps. Results of the scans were correlated with genetic and clinical data. Results: Fatty replacement was identified in 96.7% of all symptomatic patients. The tongue, the adductor magnus and the soleus were the most commonly affected muscles. Muscle pathology on MRI correlated positively with disease duration and functional impairment. Conclusions: We have described a pattern that can be considered characteristic of OPMD. An early combination of fat replacement in the tongue, adductor magnus and soleus can be helpful for differential diagnosis. The findings suggest the natural history of the disease from a radiological point of view. The information generated by this study is of high diagnostic value and important for clinical trial development.

Original languageEnglish
JournalJournal of Neurology, Neurosurgery and Psychiatry
DOIs
Publication statusAccepted/In press - Jan 1 2018

Keywords

  • muscle MRI
  • muscular dystrophy
  • oculopharyngeal muscular dystrophy
  • OPMD
  • outcome measures
  • registro español de enfermedades neuromusculares (NMD-ES)

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology
  • Psychiatry and Mental health

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