Diagnostic Ultrasound - Abdomen and Pelvis

Hypoechoic Liver Mass
Infected Biloma
Hepatic Lymphoma
(Left) Grayscale US shows a
biloma ſt after surgical
removal of a liver mass. Lowlevel
internal echoes st
suggest infected bile.
Peripheral surgical suture with
ring-down artifact and clip
with posterior shadowing
are seen along the cut liver
edge. (Right) Transverse
abdominal US in a patient with
hepatic lymphoma shows a
well-defined hypoechoic mass
ſt with thin hyperechoic rim
in segment 5 of the liver.
Differential Diagnoses: Liver
Hepatic Lymphoma
Hepatic Adenoma
(Left) Transverse abdominal
US in a patient with hepatic
lymphoma shows multiple
hypoechoic nodules ſt
throughout the liver,
consistent with diffuse hepatic
involvement of lymphoma.
(Right) Longitudinal
abdominal US of the liver
shows a heterogeneous
slightly hypoechoic hepatic
adenoma (demarcated by
calipers) abutting the dome of
the liver.
Focal Nodular Hyperplasia
Atypical Hemangioma
(Left) Transverse abdominal
US shows a predominantly
hypoechoic focal nodular
hyperplasia (FNH) st with
isoechoic center ſt in the
right lobe of the liver. In
contrast to this case, most
FNHs are isoechoic to
background liver, making
sonographic identification
often challenging and earning
the moniker "stealth lesion."
(Right) Transverse abdominal
US shows a hypoechoic
hemangioma ſt with thin
hyperechoic rim st in the right
lobe of the liver, which is a
"typical atypical" US finding of
hepatic hemangioma.
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