🩺 Rudimentary Horn

A rudimentary horn is an underdeveloped uterine structure that may be present in women with a unicornuate uterus.

It can be:

 • Communicating 

• Non-communicating 

• Functional 

• Non-functional

Why is it important?

A non-communicating functional rudimentary horn may lead to:

• Severe dysmenorrhea 

• Chronic pelvic pain

 • Hematometra

 • Endometriosis

However, the most serious complication is:

⚠️ Rudimentary Horn Pregnancy

Although rare, pregnancy can occur within a rudimentary horn through transperitoneal migration of sperm or a fertilized ovum.

Because the horn is unable to expand normally, rupture may occur during the second trimester, resulting in catastrophic intra-abdominal hemorrhage.

Early diagnosis is therefore critical.

Clinical suspicion should increase when ultrasound shows: 

• A gestational sac separate from the main uterine cavity

 • An asymmetric uterine appearance 

• Difficulty identifying continuity with the cervix

3D ultrasound and MRI may help confirm the diagnosis.

Management of rudimentary horn pregnancy is surgical removal due to the high risk of rupture.

The key message:

A rudimentary horn is not simply an anatomical curiosity.

Recognizing it early can be life-saving.

Dr Rabab Cares 

#DrRababCares 

#RudimentaryHorn #RudimentaryHornPregnancy #UnicornuateUterus #MullerianAnomalies #UterineAnomalies