Gastroshiza is a congenital defect that develops early in pregnancy, typically around the 6th to 10th week of gestation. During this stage of fetal development, the abdominal wall does not form completely, leaving an opening (usually on the right side of the belly button) through which the intestines protrude.
Unlike another condition called omphalocele, the organs in gastroshiza are not covered by a protective sac, which exposes them to amniotic fluid and increases the risk of damage and infection.
Key Characteristics of Gastroshiza
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Abdominal Opening: Typically a small hole (2–4 cm) to the right of the umbilical cord.
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Exposed Intestines: The baby’s intestines are outside of the body and may appear swollen or thickened.
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No Protective Sac: The lack of a covering membrane distinguishes gastroshiza from similar conditions.
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Single Defect: Gastroshiza usually occurs alone and is not linked to chromosomal abnormalities in most cases.
How Common Is Gastroshiza?
Although considered rare, gastroshiza has been increasing in frequency worldwide. According to global health studies:
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It occurs in about 1 in every 2,000 to 5,000 births.
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It is more common in younger mothers (particularly under the age of 20).
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Advances in prenatal screening have improved early detection rates.
Causes and Risk Factors
The exact cause of gastroshiza is not fully understood, but researchers believe it is due to a combination of genetic and environmental factors. Possible risk factors include:
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Maternal Age: Higher risk in teenage pregnancies.
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Lifestyle Factors: Smoking, alcohol, and recreational drug use during pregnancy.
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Nutritional Deficiencies: Lack of proper prenatal vitamins or folic acid.
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Environmental Factors: Exposure to harmful chemicals or infections during early pregnancy.
It’s important to note that most cases of gastroshiza are not inherited; rather, they are sporadic and unpredictable.
Diagnosis of Gastroshiza
Gastroshiza can usually be detected during pregnancy through routine prenatal screening, often between 18–20 weeks of gestation.
Common Diagnostic Tools:
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Ultrasound:
The primary tool for detecting the condition. It clearly shows loops of intestines floating outside the baby’s abdomen. -
Maternal Serum Alpha-Fetoprotein (AFP) Test:
Elevated AFP levels may indicate a fetal abdominal wall defect, prompting further investigation.
Early detection allows parents and healthcare providers to plan delivery and treatment in a hospital equipped for neonatal surgery.
Treatment Options
Treatment for gastroshiza is surgical and typically begins shortly after birth.