Abstract
Inclusion body myositis is a chronic progressive muscle disease that primarily affects middleaged and older adults aged 50 and older, and no curative treatment has been established. Dysphagia, which occurs in 40 ％of cases of inclusion body myositis, is primarily caused by degeneration and fibrosis of the cricopharyngeal muscles, leading to incomplete opening of the esophageal entrance. A characteristic feature is the presence of cricopharyngeal bar on video fluorography. In severe cases, worsening laryngeal elevation and reduced pharyngeal contraction force may complicate the condition, leading to prolonged and challenging treatment. In this report, we present a case where we performed cricopharyngeal myotomy and laryngeal elevation, combined with post-operative balloon dilatation of the-pharyngo-esophageal segment, resulting in relatively rapid improvement in dietary intake levels in a patient with dysphagia caused by inclusion body myositis.
