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Familial visceral neuropathy: a defined entity?
E C Roper1, A Gibson, M E McAlindon
1Department of Clinical Genetics, Sheffield Children's Hospital, Sheffield, United Kingdom. emmaroper@gmail.com
American Journal of Medical Genetics. Part A
|August 10, 2005
Summary
Familial visceral neuropathy (FVN) with neuronal intranuclear inclusions is a complex genetic disorder. This study reclassifies a family, revealing autosomal dominant inheritance with variable expression of FVN.
Area of Science:
- Genetics
- Neurology
- Gastroenterology
Background:
- Familial visceral neuropathy (FVN) encompasses disorders affecting the myenteric plexus.
- FVN with neuronal intranuclear inclusions presents a variable phenotype including gastrointestinal, neurological, and pupillary abnormalities.
Observation:
- A four-generation family previously classified with autosomal recessive familial esophageal achalasia was re-examined.
- New data, including affected offspring and parental symptoms, indicated a different inheritance pattern.
Findings:
- The family's condition is reclassified as autosomal dominant inheritance for FVN with neuronal intranuclear inclusions.
- Marked variation in clinical expression was observed among affected family members.
Implications:
- This reclassification refines the understanding of FVN inheritance patterns.
- Highlights the importance of detailed family history and longitudinal observation in diagnosing heterogeneous genetic disorders.