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Vasa Previa
Roya Sohaey, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Clinical Issues

          • Diagnostic Checklist

            TERMINOLOGY

            • Abbreviations

              • Vasa previa (VP)
            • Definitions

              • Fetal vessels within 2 cm or covering cervical internal os (IO)
                • Submembranous vessels unprotected by placenta or cord
                • Prone to compression and tear

            IMAGING

            • General Features

              • Ultrasonographic Findings

                • Imaging Recommendations

                  DIFFERENTIAL DIAGNOSIS

                    PATHOLOGY

                    • General Features

                      • Staging, Grading, & Classification

                        • Gross Pathologic & Surgical Features

                          CLINICAL ISSUES

                          • Presentation

                            • Demographics

                              • Natural History & Prognosis

                                • Treatment

                                  DIAGNOSTIC CHECKLIST

                                  • Consider

                                    • Image Interpretation Pearls

                                      • Reporting Tips

                                        Selected References

                                        1. Erfani H et al: Vasa previa: a multicenter retrospective cohort study. Am J Obstet Gynecol. 221(6):644.e1-5, 2019
                                        2. Klahr R et al: Frequency of spontaneous resolution of vasa previa with advancing gestational age. Am J Obstet Gynecol. 221(6):646.e1-7, 2019
                                        3. Matsuzaki S et al: Vasa previa. N Engl J Med. 380(3):274, 2019
                                        4. Melcer Y et al: Vasa previa: prenatal diagnosis and management. Curr Opin Obstet Gynecol. 30(6):385-91, 2018
                                        5. Matsubara S et al: Vasa previa: another ultrasound sign and caution at cesarean section. J Matern Fetal Neonatal Med. 1-2, 2015
                                        6. Ruiter L et al: Systematic review of accuracy of ultrasound in the diagnosis of vasa previa. Ultrasound Obstet Gynecol. 45(5):516-22, 2015
                                        7. Wortman AC et al: Bleeding complications in pregnancies with low-lying placenta. J Matern Fetal Neonatal Med. 1-5, 2015
                                        8. Bręborowicz GH et al: Prenatal diagnosis of vasa previa. J Matern Fetal Neonatal Med. 1-3, 2014
                                        9. Kuwata T et al: The 'mangrove sign' for velamentous umbilical cord insertion. Ultrasound Obstet Gynecol. 40(2):241-2, 2012
                                        10. Gagnon R et al: SOGC clinical practice guideline: guidelines for the management of vasa previa. Int J Gynaecol Obstet. 108(1):85-9, 2010
                                        11. Gandhi M et al: The association between vasa previa, multiple gestations, and assisted reproductive technology. Am J Perinatol. 25(9):587-9, 2008
                                        12. Oyelese Y et al: Vasa previa: the impact of prenatal diagnosis on outcomes. Obstet Gynecol. 103(5 Pt 1):937-42, 2004
                                        13. Stafford IP et al: Abnormal placental structure and vasa previa: confirmation of the relationship. J Ultrasound Med. 23(11):1521-2, 2004
                                        Related Anatomy
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                                        Related Differential Diagnoses
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                                        References
                                        Tables

                                        Tables

                                        KEY FACTS

                                        • Terminology

                                          • Imaging

                                            • Top Differential Diagnoses

                                              • Clinical Issues

                                                • Diagnostic Checklist

                                                  TERMINOLOGY

                                                  • Abbreviations

                                                    • Vasa previa (VP)
                                                  • Definitions

                                                    • Fetal vessels within 2 cm or covering cervical internal os (IO)
                                                      • Submembranous vessels unprotected by placenta or cord
                                                      • Prone to compression and tear

                                                  IMAGING

                                                  • General Features

                                                    • Ultrasonographic Findings

                                                      • Imaging Recommendations

                                                        DIFFERENTIAL DIAGNOSIS

                                                          PATHOLOGY

                                                          • General Features

                                                            • Staging, Grading, & Classification

                                                              • Gross Pathologic & Surgical Features

                                                                CLINICAL ISSUES

                                                                • Presentation

                                                                  • Demographics

                                                                    • Natural History & Prognosis

                                                                      • Treatment

                                                                        DIAGNOSTIC CHECKLIST

                                                                        • Consider

                                                                          • Image Interpretation Pearls

                                                                            • Reporting Tips

                                                                              Selected References

                                                                              1. Erfani H et al: Vasa previa: a multicenter retrospective cohort study. Am J Obstet Gynecol. 221(6):644.e1-5, 2019
                                                                              2. Klahr R et al: Frequency of spontaneous resolution of vasa previa with advancing gestational age. Am J Obstet Gynecol. 221(6):646.e1-7, 2019
                                                                              3. Matsuzaki S et al: Vasa previa. N Engl J Med. 380(3):274, 2019
                                                                              4. Melcer Y et al: Vasa previa: prenatal diagnosis and management. Curr Opin Obstet Gynecol. 30(6):385-91, 2018
                                                                              5. Matsubara S et al: Vasa previa: another ultrasound sign and caution at cesarean section. J Matern Fetal Neonatal Med. 1-2, 2015
                                                                              6. Ruiter L et al: Systematic review of accuracy of ultrasound in the diagnosis of vasa previa. Ultrasound Obstet Gynecol. 45(5):516-22, 2015
                                                                              7. Wortman AC et al: Bleeding complications in pregnancies with low-lying placenta. J Matern Fetal Neonatal Med. 1-5, 2015
                                                                              8. Bręborowicz GH et al: Prenatal diagnosis of vasa previa. J Matern Fetal Neonatal Med. 1-3, 2014
                                                                              9. Kuwata T et al: The 'mangrove sign' for velamentous umbilical cord insertion. Ultrasound Obstet Gynecol. 40(2):241-2, 2012
                                                                              10. Gagnon R et al: SOGC clinical practice guideline: guidelines for the management of vasa previa. Int J Gynaecol Obstet. 108(1):85-9, 2010
                                                                              11. Gandhi M et al: The association between vasa previa, multiple gestations, and assisted reproductive technology. Am J Perinatol. 25(9):587-9, 2008
                                                                              12. Oyelese Y et al: Vasa previa: the impact of prenatal diagnosis on outcomes. Obstet Gynecol. 103(5 Pt 1):937-42, 2004
                                                                              13. Stafford IP et al: Abnormal placental structure and vasa previa: confirmation of the relationship. J Ultrasound Med. 23(11):1521-2, 2004