Limb body wall complex

Limb body wall complex (LBWC), also known as body stalk anomaly or body wall complex, is a rare and severe congenital malformation syndrome characterized by major defects of the body wall (thorax and/or abdomen) associated with limb abnormalities. The condition is typically identified prenatally through ultrasound and is considered lethal, with most affected pregnancies resulting in stillbirth or neonatal death shortly after birth. The hallmark features of LBWC include large body wall defects such as thoracoschisis or abdominoschisis (openings in the chest or abdominal wall), through which internal organs may protrude (evisceration). Limb defects are a defining component and can range from absent limbs (amelia) to shortened limbs or limb constriction bands. The condition frequently involves severe scoliosis or other spinal abnormalities, craniofacial defects, and internal organ malformations including cardiac, renal, and gastrointestinal anomalies. A short or absent umbilical cord is commonly observed, with the fetus often directly attached to the placenta. The exact cause of LBWC remains unclear, and it is generally considered a sporadic developmental disruption rather than a genetic disorder with a defined inheritance pattern. Proposed mechanisms include early amnion rupture, vascular disruption, or embryonic dysgenesis. Because the condition is almost invariably lethal, there is no curative treatment. Management focuses on accurate prenatal diagnosis, genetic counseling, and supportive care for affected families. When diagnosed prenatally, families are offered comprehensive counseling regarding prognosis and options for pregnancy management.

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