Diagnostic Ultrasound - Abdomen and Pelvis

Hepatic Echinococcus Cyst
(Left) Oblique abdominal color
Doppler US shows a hepatic
echinococcal cyst ſt and fine
echogenic debris (hydatid
sand) . Detachment of the
endocyst membrane results in
floating membranes within
the pericyst ("water lily" sign)
st. (Courtesy T. Morgan, MD.)
(Right) Axial abdominal
contrast-enhanced CT in a
patient with an echinococcal
cyst shows a multiloculated
cystic mass in the right lobe of
the liver ſt.
Diagnoses: Liver
(Left) Transverse abdominal
ultrasound shows an
echinococcal cyst containing
multiple peripheral daughter
cysts ſt and heterogeneous
material centrally st. Note
the associated posterior
acoustic enhancement .
(Right) Longitudinal
abdominal grayscale US shows
an ovoid hepatic echinococcal
cyst ſt containing daughter
cysts and echogenic
internal debris st. Note
partial curvilinear rim
calcification along the cyst
wall , which causes mild
posterior acoustic shadowing
.
(Left) Transverse abdominal
grayscale US shows a hepatic
echinococcal cyst ſt
containing a daughter cyst ,
as well as detachment of the
endocyst membrane, which
results in floating membranes
within the pericyst ("water
lily" sign) st. (Right)
Longitudinal abdominal
grayscale US in the same
patient shows a hepatic
echinococcal cyst ſt with
multiple layers of floating
endocyst membranes st that
have detached resulting in the
"water lily" sign.
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