Diagnostic Ultrasound - Abdomen and Pelvis

Hypoechoic Liver Mass
Differential Diagnoses: Liver
(Left) Transverse abdominal
US in a patient with colon
cancer shows multiple small
hypoechoic metastatic nodules
in the right lobe of the liver
st. (Right) Oblique abdominal
color Doppler US shows a
centrally cystic hepatic
pyogenic abscess ſt with
surrounding hypoechoic
hepatic parenchyma in the
right lobe of the liver. Internal
septations st and echogenic
debris are seen within the
abscess.
Hepatic Metastases
Pyogenic Hepatic Abscess
(Left) Longitudinal abdominal
US shows a large, round,
hypoechoic amebic abscess in
the right lobe of the liver ſt
abutting the liver capsule .
Internal contents are
hypoechoic with
heterogeneously echogenic
scattered foci st. MIld
posterior acoustic
enhancement is seen .
(Right) Transverse abdominal
US shows a hypoechoic fungal
abscess in segment 4 of the
liver ſt.
Amebic Hepatic Abscess
Fungal Hepatic Abscess
(Left) Longitudinal abdominal
US shows focal fatty sparing
adjacent to the gallbladder
fossa as a geographic area of
decreased echogenicity ſt in
an otherwise echogenic liver
due to diffuse steatosis. Liver
adjacent to the gallbladder
fossa is a typical location for
fatty sparing. (Right)
Transverse abdominal US
shows a hypoechoic HCC ſt.
Posterior acoustic
enhancement is seen .
Underlying liver shows
heterogeneous echotexture
indicating background
cirrhosis.
Focal Fatty Sparing
Hepatocellular Carcinoma
878