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Technetium-99m-pyrophosphate scintigraphic findings of intestinal perforation in dermatomyositis
1Department of Nuclear Medicine, Taichung Veterans General Hospital, Taiwan, Republic of China.
Insights
Dermatomyositis can cause serious gastrointestinal issues, including intestinal perforation. Technetium-99m pyrophosphate imaging can help detect these complications early in adults.
Area of Science:
- Gastroenterology
- Rheumatology
- Nuclear Medicine
Background:
- Dermatomyositis is an idiopathic inflammatory myopathy.
- Gastrointestinal complications are a known, serious manifestation of dermatomyositis, particularly in pediatric cases.
- Intestinal perforation is a rare but critical gastrointestinal complication.
Observation:
- A 66-year-old male patient with dermatomyositis presented with symptoms suggestive of gastrointestinal distress.
- Abdominal radiography showed intestinal loop dilation.
- Early (5-minute) and delayed (3-hour) scintigraphy using technetium-99m pyrophosphate (99mTc-PYP) was performed.
Findings:
- Abdominal radiography findings were non-specific for perforation.
- 99mTc-PYP scintigraphy demonstrated increased radioactivity in the gastrointestinal tract.
- This increased uptake was evident in both early and delayed imaging phases.
Implications:
- 99mTc-PYP scintigraphy may serve as a valuable diagnostic tool for detecting gastrointestinal complications in adult dermatomyositis patients.
- Early detection of gastrointestinal involvement can lead to timely intervention and potentially improved outcomes.
- This case highlights the utility of nuclear imaging in evaluating gastrointestinal manifestations of inflammatory myopathies.
Abstract:
Gastrointestinal complications are more common in children than in adults and present a serious problem with dermatomyositis. We report on a 66-yr-old man with dermatomyositis who suffered from intestinal perforation. The abdominal plain radiograph revealed only dilatation of the intestinal loops; increased radioactivity, however, was clearly demonstrated in the early 5-min and delayed 3-hr 99mTc-pyrophosphate images.