Question:hard
Identify the uterine anomaly shown in the hysterosalpingogram (HSG) X-ray below.
Identify the uterine anomaly shown in the hysterosalpingogram (HSG) X-ray below.
Show Hint
A single banana-shaped, off-midline cavity with one tube.
Updated On: Jun 24, 2026
- Septate uterus
- Uterus didelphys
- Unicornuate uterus
- Bicornuate uterus
Show Solution
The Correct Option is C
Solution and Explanation
Step 1: Read the HSG by the number and arrangement of cavities the contrast fills. Each Mullerian anomaly has a signature cavity shape.
Step 2: Here only one elongated, curved cavity is opacified, sitting off the midline with a single fallopian tube. This single-horn, banana-like cavity is the hallmark of a unicornuate uterus, caused by arrested development of one paramesonephric duct. That makes option C the answer.
Step 3: Separate it from the rest: a septate uterus fills two cavities under one smooth outer contour; didelphys fills two entirely independent cavities each with its own cervix; bicornuate fills two horns with a notched fundus. None of these matches the lone single cavity shown, confirming the unicornuate uterus.
\[\boxed{\text{Unicornuate uterus}}\]
Step 2: Here only one elongated, curved cavity is opacified, sitting off the midline with a single fallopian tube. This single-horn, banana-like cavity is the hallmark of a unicornuate uterus, caused by arrested development of one paramesonephric duct. That makes option C the answer.
Step 3: Separate it from the rest: a septate uterus fills two cavities under one smooth outer contour; didelphys fills two entirely independent cavities each with its own cervix; bicornuate fills two horns with a notched fundus. None of these matches the lone single cavity shown, confirming the unicornuate uterus.
\[\boxed{\text{Unicornuate uterus}}\]
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