Tests and diagnosis

By Mayo Clinic Staff

Often, your baby's doctor can feel an olive-shaped lump — the enlarged pyloric muscle — when examining your baby's abdomen. The peristaltic waves in the baby's abdomen are another telltale sign of pyloric stenosis.

Your doctor may also order blood tests to look for signs of dehydration.

An ultrasound will usually confirm the diagnosis.

Nov. 16, 2012