MCQ – 90664

Correct Answer » B Explanation

Detailed Explanation:

Image interpretation
– MRI shows a uterus with two symmetric endometrial cavities.
– Fundal indentation is visible, dividing the uterine cavity into two separate upper horns.
– External uterine contour demonstrates a deep (>1 cm) fundal cleft.

Clinical reasoning for the correct answer
– Bicornuate uterus is characterized by two separate uterine cavities with a distinct external fundal cleft.
– MRI findings: two uterine horns and external fundal indentation support bicornuate uterus.
– Septate uterus maintains normal external contour without deep external indentation.

Why option A (Septate uterus) is incorrect
– Septate uterus: single external uterine fundus, normal contour, single uterus with septum inside.
– Image shows a pronounced external fundal cleft, not seen in septate uterus.
– Septate uterus lacks two well-separated muscular horns externally.

Why option B (Bicornuate uterus) is correct
– Two symmetric, separated uterine cavities seen.
– Deep fundal cleft (>1 cm) evident.
– Consistent with bicornuate uterus by Müllerian classification.

Why option C (Uterus didelphys) is incorrect
– Uterus didelphys: two completely separate uteri, each with its own cervix, often with a vaginal septum.
– Image does not show complete doubling of uterus and cervix.
– Shared attachment and configuration seen, rather than total duplication.

Why option D (Unicornuate uterus) is incorrect
– Unicornuate uterus: small, single uterine horn, typically lateralized, with or without rudimentary horn.
– MRI demonstrates two symmetric cavities, not a single horn.
– No evidence of a single, banana-shaped, laterally deviated uterine cavity.

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