What question did this study set out to answer?

To determine the vascular anatomy and underlying pathogenetic mechanism producing sirenomelia and its associated visceral and musculoskeletal anomalies.

September 1, 1986PEDIATRICS

Vascular Steal: The Pathogenetic Mechanism Producing Sirenomelia and Associated Defects of the Viscera and Soft Tissues

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Authors

RSRoger E. StevensonAtrium Health Wake Forest Baptist KJKenneth Lyons JonesUniversity of San Diego MPMary C. PhelanSt. Luke's General Hospital

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Implication

Case series reveals a single vitelline-derived steal artery diverting caudal blood flow in sirenomelia, indicating nutrient deprivation causes lower-body malformations rather than limb fusion.

Key Points

To determine the vascular anatomy and underlying pathogenetic mechanism producing sirenomelia and its associated visceral and musculoskeletal anomalies.
Anatomical dissection of the abdominal vasculature across 11 cases of sirenomelia (N=11).
A solitary large artery originating high in the abdominal cavity derived from the vitelline artery complex assumed umbilical artery function in all cases.
The steal vessel redirected blood and nutrients away from caudal embryonic tissues, causing severe underdevelopment, arrest, or absence of infra-arterial structures.
Evidence demonstrated that the single lower limb stems from failure of the early limb bud field to cleave into two masses, rather than posterior fusion of formed limbs.

Cite This Study

Stevenson et al. (1986) studied this question.

synapsesocial.com/papers/6aaa3efc8111eb0f60bdffa9 https://doi.org/10.1542/peds.78.3.451

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Implication

Case series reveals a single vitelline-derived steal artery diverting caudal blood flow in sirenomelia, indicating nutrient deprivation causes lower-body malformations rather than limb fusion.

Vascular Steal: The Pathogenetic Mechanism Producing Sirenomelia and Associated Defects of the Viscera and Soft Tissues

Discussion

Member takes

Implication

Key Points

Cite This Study

Vascular Steal: The Pathogenetic Mechanism Producing Sirenomelia and Associated Defects of the Viscera and Soft Tissues

Discussion

Member takes

Implication

Key Points

Cite This Study

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