Small Bowel-Small Bowel Intussusception

  • Etiology: usually transient
  • Imaging: target sign on transverse image / pseudokidney sign on sagittal image that does not involve colon, should be less than ~ 3 cm in transverse diameter, should go away within 5 minutes
  • Clinical: if not transient consider investigation for pathological lead point

Cases of Small Bowel-Small Bowel Intussusception

US of transient small bowel intussusception
Transverse greyscale US (upper left) of the left lower quadrant of the abdomen shows a soft tissue mass demonstrating a target sign measuring less than 2 cm in diameter which on transverse color doppler US (upper right) shows normal vascularity. Sagittal greyscale US of the area shows a pseudokidney sign (below). A repeat US 15 minutes later showed the mass was gone.
CT of Meckel's diverticulum causing small bowel obstructin
Axial (above), coronal (lower left) and sagittal (lower right) CT with contrast of the abdomen shows multiple dilated loops of small bowel and a soft tissue mass in the right upper quadrant just beneath the gall bladder that shows the target sign on the sagittal image and the pseudokidney sign on the transverse and coronal images. The soft tissue mass was still present on an US performed 1 hour later.