AKT-0953
A 4-year-old boy is brought in by his father. His father reports that he has been eating less and refusing food for the past few weeks. Despite this his father has noticed that his abdomen is distended and he has developed a ‘beer belly’. For the past year he has opened his bowels around once every other day, passing a stool of ‘normal’ consistency. There are no urinary symptoms. On examination he is on the 50th centile for height and weight. His abdomen is soft but slightly distended and a non-tender ballotable mass can be felt on the left side. His father has tried lactulose but there has no significant improvement. What is the most appropriate next step in management?