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By Mayo Clinic staffSigns and symptoms may vary with the severity of the condition. Sometimes they appear right after a baby is born. Other times they may not be apparent until the baby becomes a teenager or adult. In newborns, signs may include:
- Failure to pass stool within the first or second day of life
- Vomiting, including vomiting a green liquid called bile — a digestive fluid produced in the liver
- Constipation or gas, which may make a newborn fussy
- Diarrhea
In older children, signs can include:
- Swollen abdomen
- Lack of weight gain
- Problems absorbing nutrients, leading to weight loss, diarrhea or both and delayed or slowed growth
- Infections in the colon, especially in newborns or very young children, that may include enterocolitis, a serious infection with diarrhea, fever and vomiting and sometimes a dangerous expanding (dilation) of the colon
In older children or adults, signs may include chronic constipation and a low number of red blood cells (anemia) because blood is lost in the stool. Anemia can cause an affected person to look pale and to tire easily.
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