A congenital uterine anomaly characterized by the presence of two separate uterine cavities due to complete failure of Müllerian duct fusion is called:

1. A

   Uterus didelphys

2. B

   Septate uterus

3. C

   Bicornuate uterus

4. D

   Arcuate uterus

Appeared in: JIPMER Nursing Officer-2024

Explanation

• Uterus didelphys results from a complete failure of the two Müllerian ducts to fuse during embryological development.
• This failure leads to a duplication of the reproductive structures: two separate uterine cavities, two cervices, and frequently two vaginal canals.
• The key differentiator is the 'complete' failure of fusion, which distinguishes it from other anomalies like a bicornuate uterus (partial failure) or septate uterus (failure of resorption).

Why Other Options Were Wrong

• Option B: A septate uterus results from the failure of the median septum to resorb after the Müllerian ducts have already fused. The external contour of the uterus is normal, but the internal cavity is divided.
• Option C: A bicornuate uterus is caused by a partial or incomplete failure of the Müllerian ducts to fuse at the fundus. This results in two connected uterine horns and typically a single cervix.
• Option D: An arcuate uterus is considered a mild variant of a normal uterus, characterized by a slight, shallow indentation at the fundus. It results from a very minor failure of septum resorption and usually has no clinical significance.

Related Visual

• Visual 1: Diagram - A comparative illustration showing the anatomical differences between a normal uterus, uterus didelphys, bicornuate uterus, septate uterus, and arcuate uterus. This helps visualize the distinct outcomes of different Müllerian duct development errors.
• Visual 2: MRI Image - A coronal view MRI of a uterus didelphys, clearly showing two separate uterine bodies and two cervices. This demonstrates the gold standard for diagnosis.

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Congenital Uterine Anomalies (Müllerian Duct Anomalies) as background academic context rather than a clinical decision trigger.
• Nurses should be aware that patients with Müllerian anomalies are at high risk for obstetric complications, including recurrent pregnancy loss, preterm birth, and fetal malpresentation. This requires vigilant monitoring during pregnancy.
• Diagnosis often occurs during evaluation for infertility, recurrent miscarriages, or pelvic pain. A pelvic exam finding of a double cervix or a longitudinal vaginal septum should prompt further investigation with imaging (ultrasound or MRI).
• It is crucial to evaluate for associated anomalies, particularly renal abnormalities like unilateral renal agenesis, which occurs in a significant percentage of cases with uterus didelphys.

How to Approach the Question

• First, identify the key phrase in the question stem: 'complete failure of Müllerian duct fusion'.
• Next, recall the embryological basis for different congenital uterine anomalies.
• Differentiate between anomalies caused by failure of fusion versus failure of resorption.
• Uterus didelphys is defined by a 'complete' failure of fusion.
• Bicornuate uterus is defined by a 'partial' failure of fusion.
• Septate uterus is defined by a 'failure of resorption' of the septum after fusion.

Concept Tested & Keywords

• Concept Tested: Congenital Uterine Anomalies (Müllerian Duct Anomalies)
• Stem keywords: congenital uterine anomaly, two separate uterine cavities, complete failure, Müllerian duct fusion
• Lead-in keywords: is called

Question ID

QpU_yURqpq7oeVhKqy-1tc

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