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A familial visceral myopathy
Annals of Internal Medicine
|November 1, 1978
Summary
This study identifies a generalized smooth muscle disease affecting the gastrointestinal and urinary tracts, inherited in an autosomal dominant pattern. Symptoms include chronic obstruction and organ dilation due to muscle layer abnormalities.
Area of Science:
- Gastroenterology and Urology
- Genetics
- Pathology
Background:
- Visceral myopathy, a condition affecting smooth muscle, can lead to chronic organ obstruction.
- Understanding the genetic basis and clinical spectrum of such diseases is crucial for diagnosis and management.
Observation:
- A kindred with at least 18 members exhibited visceral myopathy, with 16 experiencing gastrointestinal or urinary tract obstruction.
- Radiological findings included megaduodenum, redundant colon, and megacystis.
- Histological examination revealed thinning and collagen replacement of the longitudinal muscle layer in affected organs, with normal ganglion cells.
Findings:
- Esophageal manometry showed reduced sphincter pressures and absent esophageal contractions.
- Duodenal manometry indicated low-frequency, low-amplitude contractions.
- Three patients developed peritonitis post-operatively, suggesting complications from surgical interventions on dilated segments.
Implications:
- The findings suggest a generalized smooth muscle disorder with variable clinical presentations.
- The condition appears to be inherited in an autosomal dominant or sex-linked dominant manner.
- Further research into the specific genetic mutations and therapeutic strategies is warranted.
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