Radiological imaging of intussusception.
Dr/ ABD ALLAH NAZEER. MD.
Intussusception on plain abdominal x-ray showing the target sign.
(B) Plain erect abdominal radiograph of a 6-month-old child with intussusception,
showing multiple air-fluid levels consistent with intestinal obstruction.
Ultrasound scan showing the doughnut appearance (target lesion)
of an intussusception
Longitudinal ultrasound of an intussusception—the pseudokidney sign.
Air reduction of an ileocolic intussusception. (B) Barium enema
showing intussusceptum in the distal ascending colon.
Meniscus and coiled spring sign of intussusception.
Meniscus sign of intussusception at the hepatic flexure on barium enema.
CT is the most effective and accurate diagnostic technique.
Intussusception can be confidently diagnosed on CT because of its
virtually pathognomonic appearance. It appears as a complex soft
tissue mass (sausage-like or target-like appearance), consisting of
the outer intussuscipiens and the central intussusceptum. There is
often an eccentric area of fat density within the mass representing
the intussuscepted mesenteric fat, and the mesenteric vessels are
often visible within it.
Recently, with the signs of target or sausage, mesenteric fat and
vessels, abdominal CT scan has been reported to be the most useful
imaging technique, with a diagnostic accuracy is 58%-100%.
However, imaging modalities are limited in determining the
primary cause of intussusception as well as in determining the
presence or absence of ischemic injury at the involved bowel
segment, which requires immediate surgery.
Ileocolic Intussusception from an
adenocarcinoma causing bowel edema..
ileocolic intussusception caused by mesenteric lymphadenitis.