Chorionic bump

Case contributed by Dr Matt A. Morgan


Patient presented to the ED with abdominal cramps. No vaginal bleeding. Fetal age by crown-rump length = 7 weeks 2 days.

Patient Data

Age: 30-35 years
Gender: Female

At the point of attachment of the umbilical cord with the chorion, there is a round, well-marginated, hypoechoic outpouching that extends into the choriodecidual space.

Case Discussion

A "chorionic bump" is an uncommon finding in the first trimester.  Its etiology is uncertain, but it may represent a small hematoma. A failed twin pregnancy has also been suggested as an etiology.

It is unclear if this finding results in developmental problems with the fetus or with complications of the pregnancy. Close interval follow up is prudent. The association with a chorionic bump has an almost double risk of miscarriages.

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Case information

rID: 32644
Published: 9th Dec 2014
Last edited: 5th Jan 2020
System: Obstetrics
Inclusion in quiz mode: Included

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