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Citation: Langman EL, Hertzberg BS, Boyd BK, Gupta RT. Dichorionic, diamnionic twin pregnancy discordant for anencephaly: Report of two cases and literature review. ...doi:10.2484/rcr.v8i2.843 pmid:27330630 pmcid:PMC4900103 fatcat:azyqz6zc6ndrrf6vqgebpwdg3m
Background: Discordance of birth weight has been observed in twin pairs, though little is known about prenatal and early neonatal discordance of head and brain size, and the role that zygosity and chorionicity play in discordances of early brain development in twins. Aims: To compare prenatal and neonatal discordances of head size in monozygotic-monochorionic (MZ-MC), monozygotic-dichorionic (MZ-DC), and same-sex dizygotic-dichorionic twin pairs (DZ). Study design: Subjects prospectively haddoi:10.1016/j.earlhumdev.2008.07.008 pmid:18804925 pmcid:PMC2696044 fatcat:37iwcgngojfgnomomjewc4ouiu
more »... rospectively had ultrasounds at 22 and 32 weeks gestational age, and magnetic resonance imaging (MRI) of the brain MRI after birth. Subjects: 88 twin pairs recruited from two university hospital prenatal diagnostic clinics; 22 MZ-MC, 17 MZ-DC, and 49 same-sex DZ pairs. Outcome measures: Discordance of head circumference (HC) and weight at 22 weeks, 32 weeks and birth, as well as intracranial volume (ICV) on neonatal MRI. Results: There were no group differences in discordance of head circumference and weight on the 22 or 32 week ultrasounds, or at birth. MZ-MC twins tended to have numerically greater discordances of HC and weight. There was a significant group difference in ICV on neonatal MRI (ANOVA, p = 0.0143), with DZ twins having significantly greater discordance than MZ-MC (p = 0.028) or MZ-DC (p = 0.0131) twins. Conclusions: This study indicates that zygosity and chorionicity do not contribute to significant discordances of head size in late prenatal development. DZ twins do have significantly greater discordances of ICV on neonatal MRI, suggesting a relatively greater genetic influence on brain growth in the first weeks after birth.
Corouge I, Fletcher PT, Joshi S, Gilmore JH, Gerig G (2005): Fiber tract-oriented statistics for quantitative diffusion tensor MRI analysis. ... Kriegstein A, Noctor S, Martinez-Cerdeno V (2006): Patterns of neural stem and progenitor cell division may underlie evolutionary cortical expansion. ...doi:10.1016/j.biopsych.2008.07.031 pmid:18835482 pmcid:PMC2630424 fatcat:uftnjsznuzexfnj67g6takirje
The Society of Radiologists in Ultrasound convened a multidisciplinary panel of experts in the field of vascular ultrasonography (US) to come to a consensus regarding Doppler US for assistance in the diagnosis of carotid artery stenosis. The panel's consensus statement is believed to represent a reasonable position on the basis of analysis of available literature and panelists' experience. Key elements of the statement include the following: First, all internal carotid artery (ICA) examinationsdoi:10.1097/00013644-200312000-00005 pmid:14730262 fatcat:elkvzb74z5btbl7e2mbyy3cwne
more »... (ICA) examinations should be performed with grayscale, color Doppler, and spectral Doppler US. Second, the degree of steno-From the EDV, end diastolic velocity in ICA; NPV, negative predictive value; PPV, positive predictive value; PSV, peak systolic velocity in ICA. Ratio is ICA PSV to distal common carotid artery CCA PSV. *AP, asymptomatic patients; SP, symptomatic patients. Thresholds based on outcome > sensitivity/specificity > accuracy.
Discordance of birth weight has been observed in twin pairs, though little is known about prenatal and early neonatal discordance of head and brain size, and the role that zygosity and chorionicity play in discordances of early brain development in twins.doi:10.17615/3998-pk79 fatcat:6d5bi56aabd6xo5ehsml7fv664
Analysis of axial (λ 1 ) and radial ([λ 2 +λ 3 ]/2) diffusivities, where the λ's represent tensor eigenvalues sorted by magnitude, better explains the general pattern as seen in MD ([λ 1 +λ 2 +λ 3 ]/3) ...doi:10.17615/sw17-7h75 fatcat:jikigibbozhsbm3zt4lodykqfa
Stenosis in Clinical Trials (continued)NNT indicates number of patients needed to treat over the course of 1 year with the indicated therapy as opposed to the comparator to prevent the specified event(s) ...doi:10.1002/ccd.22983 pmid:23281092 fatcat:3zpqaosiazhdxduijngfbved3e
Moutton, S. Patzer, S. Pekic, S. Perrier, S. Saikali, S.M.K., S.N., S.O., S.T., S.V., T.A., T.d.G., U.K., V.P., W.B., W.M., and W.T.G. have nothing to declare. ... A c c e p t e d M a n u s c r i p t A c c e p t e d M a n u s c r i p t 13 Results: The most common endocrine abnormalities were delayed puberty (57/74; 77% overall, 64% in males, 89% in females) and ... A c c e p t e d M a n u s c r i p t 31 A c c e p t e d M a n u s c r i p t A c c e p t e d M a n u s c r i p t 38 ...doi:10.1210/clinem/dgaa700 pmid:33005949 pmcid:PMC7823228 fatcat:jkuq66nrc5bxxoumrmxijdtzhe