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  • Title: Vasa previa evaluated by noncontrast time-of-flight magnetic resonance angiography.
    Author: Iwahashi N, Ota N, Shiro M, Yagi S, Minami S, Ino K.
    Journal: Taiwan J Obstet Gynecol; 2016 Aug; 55(4):585-7. PubMed ID: 27590387.
    Abstract:
    OBJECTIVE: Vasa previa is a rare complication, and rupture of vasa previa during pregnancy may lead to significant perinatal mortality. Here, we report a case of vasa previa evaluated prenatally using noncontrast time-of-flight magnetic resonance angiography (TOF MRA). CASE REPORT: A 22-year-old primiparous woman was referred to our hospital due to suspicion of vasa previa. Transvaginal ultrasonography showed two vessels running over the internal os. To obtain further information, magnetic resonance imaging (MRI) and TOF MRA were performed. Caesarean section was carried out, and macroscopic findings of the vascular distribution on the fetal membrane were consistent with those identified by TOF MRA. CONCLUSION: TOF MRA in addition to MRI may be an option for prenatal identification of the precise three-dimensional vascular distribution in patients with vasa previa.
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