Question:medium
What is a diagnosis based on a given image:
What is a diagnosis based on a given image:
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Single curved banana-shaped uterine cavity with one tube on HSG.
Updated On: Jun 23, 2026
- Uterus didelphys
- Bicornuate uterus
- Unicornuate uterus
- Septate uterus
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The Correct Option is C
Solution and Explanation
Step 1: On the HSG note that contrast opacifies just one slim, gently curved horn shaped like a banana, with a single tube. A solitary horn is the defining image of a unicornuate uterus.
Step 2: Embryologically one paramesonephric (Mullerian) duct fails to develop, leaving a single functional half. The fundus tapers off midline, a feature best appreciated on long-axis oblique MRI sections.
Step 3: Because Mullerian and mesonephric ducts share a developmental field, an ipsilateral renal anomaly is common; clinically there is a higher rate of miscarriage and obstetric problems.
Step 4: Distractors differ on cavity count - didelphys shows two cavities and two cervices, bicornuate shows two horns joining at one cervix with an indented fundus, and septate shows a normal outer contour split internally by a septum. Only one horn is seen here. \[\boxed{\text{Unicornuate uterus}}\]
Step 2: Embryologically one paramesonephric (Mullerian) duct fails to develop, leaving a single functional half. The fundus tapers off midline, a feature best appreciated on long-axis oblique MRI sections.
Step 3: Because Mullerian and mesonephric ducts share a developmental field, an ipsilateral renal anomaly is common; clinically there is a higher rate of miscarriage and obstetric problems.
Step 4: Distractors differ on cavity count - didelphys shows two cavities and two cervices, bicornuate shows two horns joining at one cervix with an indented fundus, and septate shows a normal outer contour split internally by a septum. Only one horn is seen here. \[\boxed{\text{Unicornuate uterus}}\]
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