<prompt> A 6-month-old baby with HO bloody diarrhoea of 2 days duration with abdominal distension and on examination the baby screams, diagnosis isIntussuscetionHUSAppendicitisAc. Enterocolitis  <response>: Clinical features of intussusceptionSudden onsetSevere paroxysmal colicky pain that recurs at frequent intervals.Pain is accompanied by straining efforts with legs and knees flexed and loud cries screaming.LethargyBlood and mucus produce a current jelly stool.Reflex vomiting is an early sign.In later stages, vomiting becomes bile stained.Abdominal distension and tenderness develop as intestinal obstruction becomes more acute.Tender sausage - shaped palpable mass in the right upper abdomen with its long axis cephalocaudal.Occasionally intestine prolapses through the rectum. 