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Reference ranges for the fetal mesencephalon to occiput measurement at 11 to 13+6 weeks of gestation

  • Authors:
    • Dragos Nemescu
    • Ana Maria Adam
    • Ingrid Andrada Tanasa
    • Demetra Socolov
    • Roxana Elena Bohiltea
    • Dan Bogdan Navolan
    • Mona Elena Zvanca
  • View Affiliations / Copyright

    Affiliations: Department of Obstetrics and Gynecology, ‘Grigore T. Popa’ University of Medicine and Pharmacy, 700115 Iasi, Romania, ‘Euromedicenter’ Medical Centre, 700469 Iasi, Romania, Department of Obstetrics and Gynecology, ‘Carol Davila’ University of Medicine and Pharmacy, 020021 Bucharest, Romania
    Copyright: © Nemescu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 2475-2480
    |
    Published online on: May 28, 2020
       https://doi.org/10.3892/etm.2020.8803
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Abstract

The objective was to have a quantitative description of the normal position of the fetal midbrain in the first trimester, through defining the reference ranges for the mesencephalon to the occipital bone distance, in the axial plane. This was a prospective study that included normal fetuses screened between 11 and 13 weeks of gestation. The distance was measured between the posterior limit of the mesencephalon to the occipital bone in the same axial view as the one required for the biparietal diameter (BPD) assessment, at this gestational age (GA). The reference ranges using quantile regression, according to the crown‑rump length (CRL), BPD, and GA were fitted. Data analysis included 428 ultrasound measurements. A good, linear correlation was observed between mesencephalon to occiput (MO) distance and CRL, BPD, or GA. It increased linearly with advancing gestation (log10MO = ‑0.1834 + 0.0092 x CRL, R2=0.48, P<0.0001) and was independent of maternal demographic characteristics and intracranial translucency (IT). In our study, the 1st percentile of the normal MO distance varies from 1.31 mm at a CRL of 45 mm to 2.08 mm at a CRL of 84 mm. The intraclass correlation coefficient (ICC) was 0.89 for intraobserver variability. A significant increase in the MO distance was found in the patients who did not receive folic acid in the first trimester of pregnancy [1.056 vs. 1.008 multiple of median (MoM), P=0.014]. A simple measurement is described between the midbrain and the occipital bone, obtained in the same axial view. It increases linearly with advancing gestation. Integration of this measurement into the routine ultrasound screening in association with the ‘crash sign’ and recognizing the lower extreme values could lead to an early diagnosis of open spina bifida (OSB).
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Copy and paste a formatted citation
Spandidos Publications style
Nemescu D, Adam AM, Tanasa IA, Socolov D, Bohiltea RE, Navolan DB and Zvanca ME: Reference ranges for the fetal mesencephalon to occiput measurement at 11 to 13+6 weeks of gestation . Exp Ther Med 20: 2475-2480, 2020.
APA
Nemescu, D., Adam, A.M., Tanasa, I.A., Socolov, D., Bohiltea, R.E., Navolan, D.B., & Zvanca, M.E. (2020). Reference ranges for the fetal mesencephalon to occiput measurement at 11 to 13+6 weeks of gestation . Experimental and Therapeutic Medicine, 20, 2475-2480. https://doi.org/10.3892/etm.2020.8803
MLA
Nemescu, D., Adam, A. M., Tanasa, I. A., Socolov, D., Bohiltea, R. E., Navolan, D. B., Zvanca, M. E."Reference ranges for the fetal mesencephalon to occiput measurement at 11 to 13+6 weeks of gestation ". Experimental and Therapeutic Medicine 20.3 (2020): 2475-2480.
Chicago
Nemescu, D., Adam, A. M., Tanasa, I. A., Socolov, D., Bohiltea, R. E., Navolan, D. B., Zvanca, M. E."Reference ranges for the fetal mesencephalon to occiput measurement at 11 to 13+6 weeks of gestation ". Experimental and Therapeutic Medicine 20, no. 3 (2020): 2475-2480. https://doi.org/10.3892/etm.2020.8803
Copy and paste a formatted citation
x
Spandidos Publications style
Nemescu D, Adam AM, Tanasa IA, Socolov D, Bohiltea RE, Navolan DB and Zvanca ME: Reference ranges for the fetal mesencephalon to occiput measurement at 11 to 13+6 weeks of gestation . Exp Ther Med 20: 2475-2480, 2020.
APA
Nemescu, D., Adam, A.M., Tanasa, I.A., Socolov, D., Bohiltea, R.E., Navolan, D.B., & Zvanca, M.E. (2020). Reference ranges for the fetal mesencephalon to occiput measurement at 11 to 13+6 weeks of gestation . Experimental and Therapeutic Medicine, 20, 2475-2480. https://doi.org/10.3892/etm.2020.8803
MLA
Nemescu, D., Adam, A. M., Tanasa, I. A., Socolov, D., Bohiltea, R. E., Navolan, D. B., Zvanca, M. E."Reference ranges for the fetal mesencephalon to occiput measurement at 11 to 13+6 weeks of gestation ". Experimental and Therapeutic Medicine 20.3 (2020): 2475-2480.
Chicago
Nemescu, D., Adam, A. M., Tanasa, I. A., Socolov, D., Bohiltea, R. E., Navolan, D. B., Zvanca, M. E."Reference ranges for the fetal mesencephalon to occiput measurement at 11 to 13+6 weeks of gestation ". Experimental and Therapeutic Medicine 20, no. 3 (2020): 2475-2480. https://doi.org/10.3892/etm.2020.8803
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