<prompt> Clinical features of pyloric stenosis in infants are All ExceptAbdominal lumpConstipationWeight lossMetabolic acidosis  <response>: Metabolic alkalosis, not acidosis is seen in hypertrophic pyloric stenosis due to loss of hydrogen ions in repeated vomiting.As the hypertrophic pyloric stenosis progresses, complete gastric outlet obstruction occurs and not even clear fluids are able to pass. This leads to constipation or passage of small green starvation stools.Rapid weight loss is seen if the condition is not detected early and treated. 