Search results
Results from the WOW.Com Content Network
Fetal abnormalities are conditions that affect a fetus or embryo, are able to be diagnosed prenatally, and may be fatal or cause disease after birth. They may include aneuploidies, structural abnormalities, or neoplasms. Acardiac twin; Achondrogenesis; Achondroplasia; Adrenal hematoma; Agenesis of the corpus callosum; Amniotic band syndrome ...
This diagnosis is generally found in routine fetal anomaly scans at 18–22 weeks gestation. It is one of the more common abnormal brain findings on prenatal ultrasound, occurring in around 1–2 per 1,000 pregnancies. [4] In many cases of mild ventriculomegaly, however, there is resolution of ventriculomegaly during the pregnancy.
The corpus callosum (Latin for "tough body"), also callosal commissure, is a wide, thick nerve tract, consisting of a flat bundle of commissural fibers, beneath the cerebral cortex in the brain. The corpus callosum is only found in placental mammals . [ 1 ]
The septum pellucidum is a thin, triangular, vertical membrane separating the anterior horns of the left and right lateral ventricles of the brain. It runs as a sheet from the corpus callosum down to the fornix. During fetal development at approximately the twelfth week of gestation, a space forms between two laminae, which is the CSP. At ...
The corpus callosum plays an extremely important role in interhemispheric communication, thus lack of or absence of these neural fibers results in a number of disabilities. [ 12 ] The lemon sign on CT scans of patients refers to the shape of the fetal skull when the frontal bones lose their normal convex contour and appear flattened or inwardly ...
During fetal development, there is a space between the two laminae called the cave of septum pellucidum that, in ninety percent of cases, disappears during infancy. [ 2 ] [ 3 ] The cavum was occasionally referred to as the fifth ventricle , but this is no longer used because the space is usually not continuous with the ventricular system . [ 4 ]
The inability of these axons to cross the midline results in anomalous axonal guidance and front-to-back projections within each hemisphere, rather than connecting between the hemispheres in the normal corpus callosum. These longitudinal callosal fascicles were originally described by Moriz Probst in 1901 by gross anatomical observation. [1]
An EIF in the fetal heart may indicate an increased chance of the baby having a chromosome problem. It does not affect the development of the baby or the function of the heart. If the baby has normal chromosomes, there would be no associated problems to be concerned about. No special treatment or tests are needed at delivery.