<prompt> Clinical features of pyloric stenosis in infants are all, EXCEPT:Abdominal lumpConstipationWeight LossMetabolic acidosis  <response>: Metabolic alkalosis, not acidosis is seen in hyperophic pyloric stenosis due to loss of hydrogen ions in repeated vomiting. Ref: Schwaz 9e, Page 1426 ; Maingots 10e, Page 2067. 