Diagnostic Ultrasound - Abdomen and Pelvis

Bowel Wall Thickening
Differential Diagnoses: Bowel
(Left) Oblique axial US
through the right iliac fossa
(RIF) shows symmetrical
thickening of the terminal
ileum ſt with preservation of
gut signature. (Right) Power
Doppler US in the same
patient shows increased flow.
Note the surrounding
echogenic fat st and deep
penetrating ulcer ſt,
appearances representing
active Crohn disease.
Crohn Disease
Crohn Disease
(Left) Long axis US of terminal
ileum shows marked mural
thickening with loss of normal
mural stratification,
appearances representing
active Crohn disease with
acute inflammatory
infiltration. Note the central
luminal narrowing ſt from
gross inflammatory thickening
st. (Right) Short axis US of the
same segment shows loss of
mural stratification. Note
central luminal narrowing ſt
and surrounding echogenic
inflamed fat .
Crohn Disease
Crohn Disease
(Left) Power Doppler US of the
same segment shows
increased mural flow ſt,
supporting active disease.
(Right) Power Doppler US in
the same patient shows
engorged vasa recta,
representing ultrasound
equivalent of comb sign .
Crohn Disease
Crohn Disease
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