Diagnostic Ultrasound - Abdomen and Pelvis

Intussusception
(Left) Transverse
transabdominal US shows
classic "bowel within bowel"
appearance of ileocolic
intussusception. Note the
compressed inner loop and
outer edematous layer with
ſt intervening crescent of
fluid st and mesenteric fat
. (Right) Longitudinal
transabdominal US shows
layering appearance of the
bowel walls involved in the
intussusception . Lymph
nodes seen close to the apex
of the intussusceptum ſt.
Diagnoses: Bowel
(Left) Transverse
transabdominal US shows
classic target appearance of
ileoileal intussusception. Note
concentric rings axial to the
plane of intussusception
and central naso-jejunal tube
tip st, the trigger for
intussusception. (Right)
Longitudinal transabdominal
US in the same patient shows
layering appearance of the
bowel walls involved in the
intussusception and
central naso-jejunal tube tip,
trigger for intussusception ſt.
(Left) Coronal MPR CT
demonstrates ileocecal
intussusception, the terminal
ileum invaginating into the
thickened cecum/proximal
ascending colon st. The
intussusceptum drags the
mesenteric fat with it ſt.
Underlying ileocecal junction
adenocarcinoma was found at
surgery. (Right) Sagittal MPR
CT in the same patient shows
ileocecal intussusception with
mesenteric fat pulled into
intussuscipiens with
mesenteric vessels ſt.
Resultant vascular
compromise predisposes to
ischemia.
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