What is the narrowest part of the fallopian tube that passes through the cornua of the uterus?

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Study for the ARRT Ultrasound Test. Engage with flashcards and multiple choice questions, each question offers hints and detailed explanations. Prepare thoroughly for your certification exam!

Multiple Choice

What is the narrowest part of the fallopian tube that passes through the cornua of the uterus?

Explanation:
The part that passes through the cornua of the uterus is the interstitial (intramural) portion. This segment runs through the thick muscular wall of the uterus (the myometrium) and opens into the endometrial cavity at the uterine horn. Its path inside the uterine wall makes its lumen the smallest, so it is the narrowest portion of the fallopian tube that actually traverses the cornual region. The other parts lie outside the uterine wall or are broader in diameter and do not pass through the cornua.

The part that passes through the cornua of the uterus is the interstitial (intramural) portion. This segment runs through the thick muscular wall of the uterus (the myometrium) and opens into the endometrial cavity at the uterine horn. Its path inside the uterine wall makes its lumen the smallest, so it is the narrowest portion of the fallopian tube that actually traverses the cornual region. The other parts lie outside the uterine wall or are broader in diameter and do not pass through the cornua.

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