Diagnostic Ultrasound - Abdomen and Pelvis

Unusual Ectopic Pregnancies
(Left) Transverse transvaginal
ultrasound shows the
interstitial line sign ſt, a thin
line extending from the
eccentric gestational sac to
the empty endometrial cavity
st. Note thinning of the
myometrium overlying the
interstitial EP. (Right)
Transverse transvaginal color
Doppler ultrasound shows
increased flow surrounding
an interstitial EP. Note
prominent arcuate vessels ſt
in the outer 1/3 of
myometrium.
Diagnoses: Female Pelvis
(Left) Transverse transvaginal
ultrasound shows an
intrauterine pregnancy in one
horn of a septate uterus
with myometrium completely
surrounding the sac ſt. The
endometrium in the left horn
is thickened with fluid . This
should not be mistaken for an
interstitial pregnancy. (Right)
Volume-rendered coronal 3D
ultrasound clearly
demonstrates an ectopically
located interstitial gestational
sac protruding from the
uterus, separate from the
empty endometrial cavity st.
Note thin intervening
interstitial line sign ſt.
(Left) Transverse transvaginal
ultrasound shows an
eccentrically located
gestational sac abutting
the echogenic endometrium
medially st with thinning of
the overlying myometrium
laterally ſt, suspected to be
an interstitial pregnancy.
(Right) Reconstructed coronal
T2 HASTE MR shows an oval
T2-hyperintense gestational
sac in the right uterine
angle with thinning of the
overlying myometrium ſt
most compatible with an
angular pregnancy. Note T2
hypointense junctional zone
st.
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