Report of joint hypermobility in malignant hyperthermia susceptible patients: Observational study with a case-control descriptive design

It is possible that predominantly proximal hypermobility is part of a clinical spectrum associated with <i>RYR1</i> gene variants, as it was present even when associated muscle weakness was not present. More studies are necessary to measure evolution and long-term impact of hypermobility in MH patients.