نتایج جستجو برای: prenatal ultrasound
تعداد نتایج: 143014 فیلتر نتایج به سال:
INTRODUCTION Hypodontia is the most frequent developmental anomaly of the orofacial complex, and its detection in prenatal ultrasound may indicate the presence of congenital malformations, genetic syndromes and chromosomal abnormalities. To date, only a few studies have evaluated the histological relationship of human tooth germs identified by two-dimensional (2D) ultrasonography. In order to a...
Objective Over the last years prenatal ultrasound has experienced the benefits of high resolution probes and the use of transvaginal ultrasound to facilitate the difficult diagnosis of central nervous system anomalies. In addition fetal MRI has become a part of a complementary tool in establishing and fine tuning the diagnosis and prognosis. Both techniques deliver their maximal potential in th...
OBJECTIVES To evaluate the sensitivity and specificity of ultrasound for detecting prenatal facial clefts in low-risk and high-risk populations. METHODS This study prospectively followed up a non-selected population, namely all pregnant women who underwent routine second-trimester prenatal ultrasound screening in the Utrecht region during the 2-year period from January 2007 to December 2008. ...
BACKGROUND Prenatal diagnostics ultrasound was established in Russia in 2000 as a routine method of screening for birth defects. The aims of the current study were twofold: to assess changes in birth defects prevalence at birth and perinatal mortality after ultrasound screening was implemented and to estimate prenatal detection rates for congenital malformations in the city of Monchegorsk (Murm...
BACKGROUND Meconium peritonitis (MP) is a rare prenatal condition that leads to substantial neonatal morbidity and mortality. PATIENTS AND METHODS All patients between 1998 and 2006 referred for prenatal diagnosis were retrospectively analyzed for diagnosis of MP. Prenatal ultrasound findings were compared with postnatal etiology, intraoperative findings, and postnatal outcome of the patients...
The frequency of inherited malformations as well as genetic disorders in newborns account for around 3-5%. These frequency is much higher in early stages of pregnancy, because serious malformations and genetic disorders usually lead to spontaneous abortion. Prenatal diagnosis allowed identification of malformations and/or some genetic syndromes in fetuses during the first trimester of pregnancy...
Bronchogenic cysts arise from abnormal buds from the primitive esophagus and tracheobronchial tree, which do not extend to the site where alveolar differentiation occurs. Bronchogenic cysts are typically unilocular mucus field lesions arising from posterior membranous wall of the air way. The prenatal diagnosis usually is realized by two-dimensional ultrasound showing the large unilocular cysti...
PURPOSE OF REVIEW Fetal hydronephrosis is the most common anomaly detected on antenatal ultrasound examination, and its significance and management remain controversial. This review aims to address the early postnatal evaluation of the child with prenatally diagnosed hydronephrosis. RECENT FINDINGS The risk of significant urological pathology increases with the severity of prenatal hydronephr...
Up till the early 1970s, prenatal diagnosis of congenital anomalies was primarily aimed at detecting chromosomal abnormalities by amniocentesis.1. Over the last two decades, prenatal diagnosis has greatly benefited from advances in ultrasound technology and in our ability to detect microscopic and submicroscopic chromosome abnormalities as well as single gene disorders, leading to substantive i...
BACKGROUND A substudy of the Management of Myelomeningocele Study evaluating urological outcomes was conducted. METHODS Pregnant women diagnosed with fetal myelomeningocele were randomly assigned to either prenatal or standard postnatal surgical repair. The substudy included patients randomly assigned after April 18, 2005. The primary outcome was defined in their children as death or the need...
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