Abstract

Intussusception is the invagination of one portion of the intestines into another, and is the most common form of intestinal obstruction in infants.[1] The vast majority of cases of intussusception are idiopathic, and are thought to be due to hyperplasia of the lymphoid tissue in the Peyer 's patches of the terminal ileum. The clinical diagnosis of intussusception may be difficult to make as it may be masked by its propensity to occur in the context of viral gastroenteritis. The diagnosis of intussusception can be made wi th sonography, plain abdominal radiographs or contrast enema. Ultrasonography has been found to have a negative predictive value of 100%. However, we report a case of a full term 7-month-old male with no significant medical history who presented to the emergency department with fever, decreased PO intake, decreased urine output, and vomiting for three days, that was subsequently diagnosed with a small bowel obstruction secondary to intussusception without sonographic evidence of intussusception on two ultrasound studies.

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