PDF Cricopharyngeal Myotomy for Inclusion Body Myositis ...
Cricopharyngeal Myotomy for Inclusion Body Myositis Associated Dysphagia
David J. Archibald, MD, Matthew L. Carlson, MD, Jan L. Kasperbauer, MD Dept of Otolaryngology-Head and Neck Surgery; Mayo Clinic School of Medicine, Rochester, MN
INTRODUCTION
Inclusion body myositis (IBM) is a chronic, progressive, acquired myopathy, most frequently occurring in patients older than 50 years of age. It is characterized a slow progression of painless muscle weakness of the proximal and distal muscles. Currently, there is no known effective treatment for this condition.
Dysphagia is more common in IBM than in the other inflammatory myopathies and more severe. It is reported to occur in 38?84% of patients. The resultant aspiration pneumonia associated respiratory failure may be the most common cause of death in people with IBM .
Surgical interventions such as cricopharyngeal myotomy (CPM) and upper esophageal dilation as well as botulinum injections of the upper esophageal sphincter (UES) have been studied in patients with IBM, but a comprehensive evaluation of CPM and its efficacy has not been reported.
The objective of this study was to determine the efficacy of transcervical and endoscopic approaches for CPM in patients with IBM.
METHODS
This is a retrospective clinical study including all IBM patients who underwent CPM for dysphagia between 2000-2008 at a tertiary care institution. Data collected included demographic information, patients' clinical examinations, biopsy and electromyographic confirmation of IBM diagnosis, videofluoroscopic swallow studies, preoperative weight loss, previous dilatations, surgical approach, length of myotomy, duration of hospitalization, drain placement, complications, and outcome of dysphagia.
Descriptive statistics were reported using means, medians, and ranges. Groups were compared using Wilcoxon's rank-sum tests. P ................
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