Gastrointestinal and Hepatic Disease in the Inflammatory Myopathies.

Although muscle weakness is the pathognomonic feature of idiopathic inflammatory myopathies, systemic organ involvement is not uncommon. The gastrointestinal and hepatic manifestations are well known. Oropharyngeal dysphagia is the most common gastrointestinal symptom and can be severe. Gastric and small intestinal motility disorders, including chronic intestinal pseudo-obstruction, celiac disease, and inflammatory bowel disease have been described. Comprehensive cancer screening is warranted soon after the diagnosis of inflammatory myopathies due to high risk of occult malignancies. Elevated aminotransferases may suggest muscular injury rather than hepatic dysfunction. Knowledge regarding systemic involvement of inflammatory myopathies can assist in timely diagnosis of these complex disorders.