Depending on the region of the world, malformations of the abdominal wall are present already at prenatal ultrasound examination and the remainder shortly after birth.
Abdominal wall defects of the midline combined with abdominal eviscerations and abnormal findings during the physiological healing process of the navel are the presenting signs.
The prevalence of these malformations is different and extends from frequent ≥1: 1,000 live births to relatively frequent ≥1:5,000, to rare ≥1:10,000, and to very rare ≥1:50,000. This phenomenon of variable prevalence applies to all anomalies. Reliable figures can demonstrate changes in occurrence of single malformation and permit epidemiological conclusions.
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