58

CASE 58



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CRL = crown rump links.



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History: A patient with a positive beta–human chorionic gonadotropin (β-hCG) and pelvic pain presents to be examined for the presence of a normal gestational sac.



1. What criteria are used to aid in distinguishing a normal intrauterine pregnancy (IUP) from an abnormal one? (Choose all that apply.)


A. A gestational sac seen on transvaginal ultrasound with a mean sac diameter (MSD) of 25 mm or more should contain a visible embryo.


B. A yolk sac should be visible when the MSD seen on transvaginal ultrasound is 25 mm or more.


C. Fetal heart motion is usually detected when the fetal pole is equal to or greater than 2 mm.


D. Visualization of an amnion and the yolk sac but not an embryo when the gestational sac is 25 mm or more in mean sac diameter raises the question of pregnancy loss.


2. What does the most recent data suggest about the use of an absolute isolated quantitative beta hCG to determine the timing of the appearance of a gestational sac in the uterus on transvaginal ultrasound?


A. The absolute value of the quantitative beta hCG should not be used to determine whether a true intrauterine gestational sac could be seen.


B. 1000 mIU/mL is the threshold to see a gestational sac.


C. 5000 mIU/mL is the threshold to see a gestational sac in the uterus.


D. 10,000 mIU/mL is the new threshold to see a gestational sac in the uterus.


3. What is the significance of an abnormal or absent yolk sac?


A. Poor pregnancy outcome


B. No significance


C. Certain mortality


D. Rarely deleterious


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Jan 10, 2016 | Posted by in OBSTETRICS & GYNAECOLOGY IMAGING | Comments Off on 58

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