An 8-year-old boy complained of abdominal pain in the afternoon and vomited twice. No fever is noted, and he has not had any diarrhea. On examination the next morning, he has diffuse lower abdominal pain with rebound tenderness on the lower right side. On rectal examination, there is no localization.
What is your next recommendation?
A) Complete blood count (CBC) and urine analysis (UA) only
B) Immediate surgery for appendicitis
C) Observation without further treatment
D) CBC, UA, and abdominal ultrasound
E) Barium enema to diagnose and treat a presumed intussusception
