Diagnostic Ultrasound - Abdomen and Pelvis

Enlarged Ovary
Differential Diagnoses: Female Pelvis
(Left) Longitudinal
endovaginal US shows a
typical corpus luteum as an
anechoic cyst with a thick and
crenulated wall ſt. It is
important to remember that
corpus lutea may show
variable degrees of simple or
complex internal fluid. (Right)
Endovaginal US in a 34-yearold
woman with adnexal
torsion presenting with acute
pelvic pain shows an enlarged,
6-cm ovary with
heterogeneous echogenicity
and a corpus luteum . Note
the lack of power Doppler
flow.
Corpus Luteum/Luteal Cyst
Adnexal Torsion
(Left) Transabdominal US
shows a large unilocular cystic
mass in the right adnexa
without septations or mural
nodules. (Right) Power
Doppler US of the left adnexa
shows a large homogeneously
hypoechoic endometrioma
with no internal vascularity.
Diffuse homogeneous lowlevel
echoes within the mass
as well as posterior acoustic
enhancement st are
characteristic of an
endometrioma.
Serous Cystadenoma
Endometrioma
(Left) US in a 31-year-old
woman undergoing ovulation
induction presenting with
abdominal pain and distention
shows bilateral enlarged
heterogenous ovaries
(calipers), both measuring 8
cm in length with multiple
follicles. Note the echogenic
ascites due to 3rd spacing
or hemorrhage. (Right)
Coronal CECT shows massive
bilateral ovarian enlargement
and replacement by multiple
fluid-density cysts and
moderate ascites ,
consistent with ovarian
hyperstimulation syndrome.
Ovarian Hyperstimulation
Ovarian Hyperstimulation
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