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Circumvallate Placenta
Roya Sohaey, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Abbreviations

                • Circumvallate placenta (CP)
              • Synonyms

                • Placental band or shelf
                • Extrachorial placenta
              • Definitions

                • Chorionic membrane does not insert at edge of placenta but at some inward distance from margin
                  • Placenta edge is thickened and rolled up
                  • Edge protrudes into uterine cavity
                • Circummarginate placenta
                  • Only membranes involved
                  • Placental margin not deformed
                  • Usually not US diagnosis

              IMAGING

              • General Features

                • Ultrasonographic Findings

                  • Imaging Recommendations

                    DIFFERENTIAL DIAGNOSIS

                      PATHOLOGY

                      • General Features

                        • Gross Pathologic & Surgical Features

                          • Microscopic Features

                            CLINICAL ISSUES

                            • Presentation

                              • Demographics

                                • Natural History & Prognosis

                                  DIAGNOSTIC CHECKLIST

                                  • Consider

                                    • Image Interpretation Pearls

                                      Selected References

                                      1. Mostafa M et al: HDlive image of circumvallate placenta. Ultrasound Obstet Gynecol. ePub, 2015
                                      2. Taniguchi H et al: Circumvallate placenta: associated clinical manifestations and complications-a retrospective study. Obstet Gynecol Int. 2014:986230, 2014
                                      3. Arlicot C et al: Three-dimensional surface rendering of the chorionic placental plate: the "tire" sign for the diagnosis of a circumvallate placenta. J Ultrasound Med. 31(2):340-1, 2012
                                      4. Suzuki S: Clinical significance of pregnancies with circumvallate placenta. J Obstet Gynaecol Res. 34(1):51-4, 2008
                                      5. Shen O et al: Placental shelf - a common, typically transient and benign finding on early second-trimester sonography. Ultrasound Obstet Gynecol. 29(2):192-4, 2007
                                      6. Harris RD et al: Accuracy of prenatal sonography for detecting circumvallate placenta. AJR Am J Roentgenol. 168(6):1603-8, 1997
                                      7. McCarthy J et al: Circumvallate placenta: sonographic diagnosis. J Ultrasound Med. 14(1):21-6, 1995
                                      8. Sistrom CL et al: Abnormal membranes in obstetrical ultrasound: incidence and significance of amniotic sheets and circumvallate placenta. Ultrasound Obstet Gynecol. 3(4):249-55, 1993
                                      9. Bey M et al: The sonographic diagnosis of circumvallate placenta. Obstet Gynecol. 78(3 Pt 2):515-7, 1991
                                      Related Anatomy
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                                      Related Differential Diagnoses
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                                      References
                                      Tables

                                      Tables

                                      KEY FACTS

                                      • Terminology

                                        • Imaging

                                          • Top Differential Diagnoses

                                            • Pathology

                                              • Clinical Issues

                                                • Diagnostic Checklist

                                                  TERMINOLOGY

                                                  • Abbreviations

                                                    • Circumvallate placenta (CP)
                                                  • Synonyms

                                                    • Placental band or shelf
                                                    • Extrachorial placenta
                                                  • Definitions

                                                    • Chorionic membrane does not insert at edge of placenta but at some inward distance from margin
                                                      • Placenta edge is thickened and rolled up
                                                      • Edge protrudes into uterine cavity
                                                    • Circummarginate placenta
                                                      • Only membranes involved
                                                      • Placental margin not deformed
                                                      • Usually not US diagnosis

                                                  IMAGING

                                                  • General Features

                                                    • Ultrasonographic Findings

                                                      • Imaging Recommendations

                                                        DIFFERENTIAL DIAGNOSIS

                                                          PATHOLOGY

                                                          • General Features

                                                            • Gross Pathologic & Surgical Features

                                                              • Microscopic Features

                                                                CLINICAL ISSUES

                                                                • Presentation

                                                                  • Demographics

                                                                    • Natural History & Prognosis

                                                                      DIAGNOSTIC CHECKLIST

                                                                      • Consider

                                                                        • Image Interpretation Pearls

                                                                          Selected References

                                                                          1. Mostafa M et al: HDlive image of circumvallate placenta. Ultrasound Obstet Gynecol. ePub, 2015
                                                                          2. Taniguchi H et al: Circumvallate placenta: associated clinical manifestations and complications-a retrospective study. Obstet Gynecol Int. 2014:986230, 2014
                                                                          3. Arlicot C et al: Three-dimensional surface rendering of the chorionic placental plate: the "tire" sign for the diagnosis of a circumvallate placenta. J Ultrasound Med. 31(2):340-1, 2012
                                                                          4. Suzuki S: Clinical significance of pregnancies with circumvallate placenta. J Obstet Gynaecol Res. 34(1):51-4, 2008
                                                                          5. Shen O et al: Placental shelf - a common, typically transient and benign finding on early second-trimester sonography. Ultrasound Obstet Gynecol. 29(2):192-4, 2007
                                                                          6. Harris RD et al: Accuracy of prenatal sonography for detecting circumvallate placenta. AJR Am J Roentgenol. 168(6):1603-8, 1997
                                                                          7. McCarthy J et al: Circumvallate placenta: sonographic diagnosis. J Ultrasound Med. 14(1):21-6, 1995
                                                                          8. Sistrom CL et al: Abnormal membranes in obstetrical ultrasound: incidence and significance of amniotic sheets and circumvallate placenta. Ultrasound Obstet Gynecol. 3(4):249-55, 1993
                                                                          9. Bey M et al: The sonographic diagnosis of circumvallate placenta. Obstet Gynecol. 78(3 Pt 2):515-7, 1991