Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Unicornuate uterus
Introduction
- Failure of one müllerian duct to elongate while the other develops normally
- Accounts for approximately 20% of müllerian duct anomalies.
- The embryologic predominance of the unicornuate uterus to be on the right has not been explained.
- Spontaneous abortion rates are reported to range from 41% to 62%.
- Reported premature birth rates range from 10% to 20%
- Fetal survival rates, from 38% to 57% (pooled data, 40%).
- Renal abnormalities are more commonly associated with unicornuate uterus than with other müllerian duct anomalies
- Reported in 40% of these patients.
- Anomaly is always ipsilateral to the rudimentary horn.
- Renal agenesis is the most commonly reported abnormality, occurring in 67% of cases.
Diagnosis
Diagnosis
HSG
- Endometrial cavity assumes a fusiform shape, tapering at the apex and draining into a solitary fallopian tube.
- Uterus is generally shifted off of midline.
MRI
- Unicornuate uterus appears curved and elongated, with the external uterine contour assuming a banana shape.
- Uterine volume is reduced, and the configuration of the uterus is asymmetric.
- Normal myometrial zonal anatomy is maintained.
Images
Images
Patient #1
See Also
See Also
References for Unicornuate uterus
References for Unicornuate uterus
- Robert N. Troiano, and Shirley M. McCarthy. Müllerian Duct Anomalies: Imaging and Clinical Issues. Radiology 2004 233: 19-34.
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