A patient with a history of recurrent second-trimester miscarriages undergoes an MRI. The scan shows a heart-shaped uterine cavity with two distinct horns. What is the most likely diagnosis?

1. A

   didelphys uterus

2. B

   septate uterus

3. C

   unicornuate uterus

4. D

   bicornuate uterus

Appeared in: RRB Nsg. Superintendent-2026 (Shift -3rd)

Explanation

• A bicornuate uterus is a congenital anomaly caused by the incomplete fusion of the Müllerian ducts, resulting in a single uterus with two horns and a deep fundal cleft, giving it a 'heart shape'.
• This anatomical variation is strongly associated with adverse obstetric outcomes, particularly recurrent second-trimester miscarriages and preterm labor, which matches the patient's history.
• The MRI findings described—a heart-shaped cavity with two distinct horns—are the definitive diagnostic features for a bicornuate uterus, distinguishing it from other Müllerian anomalies.

Why Other Options Were Wrong

• Option A: A didelphys uterus involves a complete failure of fusion, resulting in two separate uterine bodies and two cervices, which is a more extensive anomaly than described.
• Option B: A septate uterus has a normal external fundal contour but is divided internally by a septum. The question specifies a heart-shaped external appearance with two horns.
• Option C: A unicornuate uterus results from the failure of one Müllerian duct to develop, leading to a single uterine horn. This contradicts the MRI finding of 'two distinct horns'.

Related Visual

• Visual 1: Diagram - A comparative illustration showing the anatomical differences between a normal uterus, bicornuate uterus, septate uterus, didelphys uterus, and unicornuate uterus. This helps clarify the fusion/resorption defects for each type.
• Visual 2: MRI Image - A sample coronal MRI view of a bicornuate uterus, clearly labeling the two horns and the deep fundal cleft, contrasting it with an MRI of a septate uterus showing a normal external contour.

Clinical Relevance

• Nursing practice connection: Use the key finding related to Identification of Müllerian duct anomalies based on clinical history and imaging findings to guide bedside assessment, documentation, and the next nursing action.
• Nurses should be aware that patients with known Müllerian anomalies require close monitoring during pregnancy for complications like preterm labor, cervical insufficiency, and fetal malpresentation.
• Patient education is crucial. The nurse can help explain the condition, the associated risks in pregnancy, and the plan for surveillance, helping to manage patient anxiety.
• What if? If the patient had recurrent first-trimester miscarriages and the MRI showed a normal external uterine shape with an internal division, the most likely diagnosis would be a septate uterus, which is often correctable with hysteroscopic surgery.

How to Approach the Question

• First, identify the key pieces of information in the clinical scenario: the patient's history (recurrent second-trimester miscarriages) and the diagnostic findings (MRI showing a heart-shaped uterus with two horns).
• Next, recall the different types of Müllerian duct anomalies and their characteristic anatomical features.
• Systematically compare the MRI description to the known features of each option.
• A 'heart-shaped' uterus with 'two horns' is the classic description of a bicornuate uterus. This results from incomplete fusion.
• Eliminate other options based on their definitions: 'didelphys' is complete non-fusion (two uteri), 'septate' has a normal outer shape with an inner wall, and 'unicornuate' has only one horn.
• Confirm the diagnosis by linking the anatomical finding to the clinical history. Recurrent second-trimester loss is a known complication of a bicornuate uterus due to the altered uterine shape and capacity.

Concept Tested & Keywords

• Concept Tested: Identification of Müllerian duct anomalies based on clinical history and imaging findings.
• Stem keywords: recurrent second-trimester miscarriages, MRI, heart-shaped uterine cavity, two distinct horns
• Lead-in keywords: most likely diagnosis
• Clinical cues: The combination of 'recurrent second-trimester miscarriages' and the specific MRI description 'heart-shaped uterine cavity with two distinct horns' points directly to a bicornuate uterus.

Question ID

QZrW0jdByyEYIRCfA43Teg

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