Category Pediatric Imaging

Meckel Diverticulum

KEY FACTS Terminology Most common omphalomesenteric duct remnant Imaging Classic imaging appearance (in patient with GI bleeding): Focal persistent accumulation of radiotracer in right lower quadrant on nuclear pertechnetate scan (Meckel scan) Coincident with & isointense to gastric uptake as…

Ileocolic Intussusception

KEY FACTS Terminology Invagination of distal small bowel (intussusceptum) into colon (intussuscipiens) in telescope-like manner Imaging US: Best diagnostic modality if clinically suspected Round mass with target sign in right abdomen Mean diameter of 2.6 cm (vs. 1.5 cm for…

Appendicitis

KEY FACTS Terminology Acute obstruction of appendiceal lumen → distention → ↑ intraluminal pressure → venous obstruction → ischemia → superimposed infection of appendiceal wall → eventual perforation Imaging US 1st-line modality in child with RLQ pain Noncompressible, dilated, tubular…

Hernias

KEY FACTS Terminology Hernia: Protrusion of contents from normally encasing body cavity through normal or abnormal opening Inguinal hernia: Protrusion of abdominal contents through defect in inguinal region Indirect inguinal hernia: Contents protrude into open deep inguinal ring, extend through…

Ingested Multiple Magnets

KEY FACTS Terminology Ingestion of multiple magnets or single magnet + additional metallic foreign bodies Potential for significant bowel complications Rare-earth magnets 5-10x stronger than traditional magnets Imaging Metallic density foreign bodies; shapes variable Magnets attract through bowel walls Multiple…