公益財団法人田附興風会 医学研究所北野病院

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Hypertrophic pyloric stenosis

Hypertrophic pyloric stenosis(Airplane aviation company)What is it?

The exit of the stomach is called the pylorus. This is a disease in which the muscles of the pylorus thicken, preventing milk from leaving the stomach. It is often discovered when vomiting becomes more frequent around 2-3 weeks after birth. It is more common in first-born boys, and the cause is unknown.

What about testing?

Generally, an ultrasound examination is used to measure the thickness and length of the pyloric muscle. The thickness is often 4mm or more. If there is a possibility of other diseases, a contrast test of the stomach may be performed.

肥厚した幽門筋

Thickened pylorus muscle

What about treatment?

Generally, the thickened pylorus muscle is surgically incised. At our hospital, we mainly perform this surgery using a laparoscope, which leaves a small incision.


Another treatment option is a drug called atropine sulfate, but its effectiveness is not stable, so it is not a standard treatment.

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