Professional
Technical
IVT
chorionic bump sign
Ultrasound finding indicating chorioamniotic membrane separation, appearing as a protrusion of chorion into the amniotic space.
Full Definition
A sonographic sign observed during first and early second trimester ultrasound examinations, characterized by localized elevation of the chorionic membrane creating a bump-like appearance. This finding may indicate early chorioamniotic separation or bleeding between the membranes. The sign is typically transient and often resolves spontaneously, but requires monitoring as it may be associated with increased risk of pregnancy complications. Recognition of this finding is important for proper counseling and follow-up planning.
Usage
Usage note: Often written without hyphens in clinical documentation.
In Context
- "The ultrasound report noted a small chorionic bump sign at 12 weeks gestation with no associated bleeding." — Radiology report
- "Follow-up scanning showed resolution of the chorionic bump sign by 16 weeks." — Clinical documentation
Also known as
chorioamniotic separation
membrane bump
Don't confuse with
subchorionic hematoma
yolk sac abnormality