Q. A 3-year-old male is brought to the emergency department because he has been experiencing episodes of crying, abdominal pain, and vomiting for the past 24 hours. He has also had several episodes of non-bloody, mucus-like diarrhea. The patient is otherwise healthy with no significant past medical history. He is up to date on all of his immunizations, and lives at home with his parents and 2 older siblings. He is a full-term, normal birth weight baby with no known developmental delays. On physical examination, he is crying and appears to be in pain. His temperature is 37.5 degrees Celsius (99.5 degrees Fahrenheit), heart rate is 140/min, and his respiratory rate is 20/min. His head assessment is normocephalic and atraumatic, with no conjunctival injection or cervical lymphadenopathy. His lungs are clear to auscultation and percussion bilaterally, and his heart is in regular rate and rhythm, with no murmurs or gallops. The patient’s abdomen is distended, with a sausage-shaped mass palpated in the right upper quadrant, and you discover a currant jelly-like stool. Bowel sounds are present, with no significant hepatosplenomegaly. You order an abdominal ultrasound (see image). Based on the information you have at this point in time, which of the following statements is true regarding his most likely diagnosis?