학술논문
FundAl Retroflexion (FAR) Angle is a Novel Sonographic Marker Associated With Cesarean Scar Pregnancies in the First Trimester: A Case-Control Study.
Document Type
Academic Journal
Author
Zhang-Rutledge K; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, La Jolla, California, USA.; Pinson K; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, La Jolla, California, USA.; Perez M; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, La Jolla, California, USA.; Adami RR; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, La Jolla, California, USA.; Melber D; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, La Jolla, California, USA.; Jacobs M; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, La Jolla, California, USA.; Parast M; Department of Pathology, University of California, La Jolla, California, USA.; Lamale-Smith L; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, La Jolla, California, USA.; Averbach S; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, La Jolla, California, USA.; Hahn M; Department of Radiology, University of California, La Jolla, California, USA.; Pretorius D; Department of Radiology, University of California, La Jolla, California, USA.; Ballas J; Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, La Jolla, California, USA.
Source
Publisher: John Wiley and Sons Country of Publication: England NLM ID: 8211547 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1550-9613 (Electronic) Linking ISSN: 02784297 NLM ISO Abbreviation: J Ultrasound Med Subsets: MEDLINE
Subject
Language
English
Abstract
Objectives: Early diagnosis of Cesarean scar pregnancies (CSP) remains difficult. This study describes a novel sonographic marker, the FundAl Retroflexion (FAR) angle, that may be used in the first trimester. The objective of the study is to compare the FAR angle between CSP and normal pregnancies.
Methods: For this case-control study, we reviewed images from our institution's database that were acquired from January 2016 to December 2019. All cases of CSP and randomly selected controls, defined as patients with history of Cesarean delivery and normal implantation, that underwent ultrasound evaluation at <14 weeks were included. The FAR angle, defined as the acute angle created between the endometrial echo and cervical canal, was measured. The mean FAR angle was then compared between the two groups and a receiver operating characteristic (ROC) curve was generated.
Results: We identified 15 cases of CSP during the study period and were able to measure the FAR angle in 14 of the cases. The mean FAR angle was larger in CSP than in normal control pregnancies (45° versus 27°, respectively, P < 0.001). Using an ROC curve, a FAR angle cut off of 40° maximizes the ability to distinguish between CSP from normal pregnancies.
Conclusions: The FAR angle provides an easily obtainable and numerical measurement. CSP have larger FAR angle compared to normal controls with a distinguishing cut off of 40°. Larger studies are needed to determine if using the FAR angle can improve first trimester diagnosis for CSP.
(© 2021 American Institute of Ultrasound in Medicine.)
Methods: For this case-control study, we reviewed images from our institution's database that were acquired from January 2016 to December 2019. All cases of CSP and randomly selected controls, defined as patients with history of Cesarean delivery and normal implantation, that underwent ultrasound evaluation at <14 weeks were included. The FAR angle, defined as the acute angle created between the endometrial echo and cervical canal, was measured. The mean FAR angle was then compared between the two groups and a receiver operating characteristic (ROC) curve was generated.
Results: We identified 15 cases of CSP during the study period and were able to measure the FAR angle in 14 of the cases. The mean FAR angle was larger in CSP than in normal control pregnancies (45° versus 27°, respectively, P < 0.001). Using an ROC curve, a FAR angle cut off of 40° maximizes the ability to distinguish between CSP from normal pregnancies.
Conclusions: The FAR angle provides an easily obtainable and numerical measurement. CSP have larger FAR angle compared to normal controls with a distinguishing cut off of 40°. Larger studies are needed to determine if using the FAR angle can improve first trimester diagnosis for CSP.
(© 2021 American Institute of Ultrasound in Medicine.)