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Pathogenesis of the lethal multiple pterygium syndrome
P Moerman1, J P Fryns, A Cornelis
1Department of Pathology, Katholieke Universiteit Leuven, Belgium.
American Journal of Medical Genetics
|March 1, 1990
Summary
Lethal multiple pterygium syndrome (LMPS) involves lymphatic obstruction and fetal akinesia, likely due to early muscle dystrophy. Placental lesions resembling triploidy are specific to LMPS, suggesting a unified genetic cause.
Area of Science:
- Medical Genetics
- Developmental Biology
- Pathology
Background:
- Lethal multiple pterygium syndrome (LMPS) is a severe congenital disorder.
- Previous understanding of LMPS pathogenesis remains incomplete, particularly regarding neuromuscular involvement.
Purpose of the Study:
- To investigate the neuromuscular system in fetuses with LMPS.
- To elucidate the underlying mechanisms and potential unifying factors in LMPS.
Main Methods:
- Autopsy studies were conducted on four unrelated fetuses diagnosed with LMPS.
- Detailed examination focused on the neuromuscular system and placental pathology.
Main Results:
- LMPS presents with features of both jugular lymphatic obstruction and severe fetal akinesia.
- Generalized amyoplasia, resembling muscular dystrophy, is identified as a key factor in fetal akinesia, independent of central nervous system abnormalities.
- Placentas in all cases showed triploidy-like lesions, specific to LMPS.
Conclusions:
- LMPS likely results from a genetically determined insult affecting early embryonic development of lymph vessels and muscles.
- The findings suggest LMPS may be a more homogeneous condition than previously thought.
- The study proposes a dual sequence of lymphatic obstruction and muscular dystrophy as central to LMPS pathogenesis.