Chorionic bump

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Chorionic bump is a rare medical condition defined as an irregular, convex bulge or protrusion from the choriodecidual surface into the gestational sac.{{Cite journal |last1=Yousaf |first1=Amman |last2=Tayyab |first2=Ahmad |last3=Anil |first3=Muhammad Sana Ullah |last4=Ahmed |first4=Mohamed Mohamed Helmi |last5=Sr |first5=Sana Sayed Hussein Badr Ahmed Ahmed |last6=Alobadli |first6=Amal |last7=Yousaf |first7=Amman |last8=Tayyab |first8=Ahmad |last9=Anil |first9=Muhammad S. |last10=Ahmed |first10=Mohamed Mohamed Helmi |last11=Sr |first11=Sana Sayed Hussein Badr Ahmed Ahmed |last12=Alobadli |first12=Amal |display-authors=4 |date=2020-11-14 |title=Chorionic Bump: Radiologic Features and Pregnancy Outcomes |journal=Cureus |language=en |volume=12 |issue=11 |pages=e11480 |doi=10.7759/cureus.11480 |doi-access=free |issn=2168-8184 |pmc=7735167 |pmid=33329976}}{{Cite journal |last1=Liu |first1=Emily |last2=Noor |first2=Abdul |last3=Pereira |first3=Nigel |date=2024-07-01 |title=Chorionic Bump: An Early Marker for Miscarriage and Embryonic Aneuploidy? |url=https://linkinghub.elsevier.com/retrieve/pii/S1701216324003992 |journal=Journal of Obstetrics and Gynaecology Canada |language=English |volume=46 |issue=7 |doi=10.1016/j.jogc.2024.102576 |issn=1701-2163 |pmid=38852808|url-access=subscription }} It is medically defined as a separate entity from a chorionic hematoma.{{Cite journal |last1=Sana |first1=Y. |last2=Appiah |first2=A. |last3=Davison |first3=A. |last4=Nicolaides |first4=K. H. |last5=Johns |first5=J. |last6=Ross |first6=J. A. |display-authors=4 |date=2013 |title=Clinical significance of first-trimester chorionic bumps: a matched case–control study |url=https://obgyn.onlinelibrary.wiley.com/doi/10.1002/uog.12528 |journal=Ultrasound in Obstetrics & Gynecology |volume=42 |issue=5 |pages=585–589 |doi=10.1002/uog.12528 |pmid=23733598 |issn=1469-0705}}

Identification of a chorionic bump in early first trimester pregnancy represents a significant risk factor for pregnancy loss, given a live birth rate of less than 50%.{{Cite journal |last1=Harris |first1=Robert D. |last2=Couto |first2=Corey |last3=Karpovsky |first3=Clara |last4=Porter |first4=Misty M. Blanchette |last5=Ouhilal |first5=Sophia |display-authors=4 |date=2006 |title=The Chorionic Bump |url=https://onlinelibrary.wiley.com/doi/10.7863/jum.2006.25.6.757 |journal=Journal of Ultrasound in Medicine |language=en |volume=25 |issue=6 |pages=757–763 |doi=10.7863/jum.2006.25.6.757 |pmid=16731892 |issn=1550-9613|url-access=subscription }} The incidence rate for chorionic bump is estimated to be between 1.5 and 7 per 1000 pregnancies.