Search results
Results From The WOW.Com Content Network
In affected children studied, the first signs of Pretzel syndrome begin during gestation: 80% of mothers have polyhydramnios, extra amniotic fluid around the affected baby. The majority of mothers also have preterm labor starting anywhere from 25–38 weeks gestation. The brain is large and malformed in all affected children.
Polyhydramnios is a medical condition describing an excess of amniotic fluid in the amniotic sac.It is seen in about 1% of pregnancies. [1] [2] [3] It is typically diagnosed when the amniotic fluid index (AFI) is greater than 24 cm. [4] [5] There are two clinical varieties of polyhydramnios: chronic polyhydramnios where excess amniotic fluid accumulates gradually, and acute polyhydramnios ...
Although very little is still known as to the direct cause of megalencephaly, recent studies have begun to provide early indications of possible sources for its formation. Recent research has shown that there is a strong link between genetic pathways that cause brain develop and mutations in that pathway that result in brain overgrowth.
[1] [3] Polyhydramnios is frequently observed. [ 2 ] Characteristic facial features of Perlman syndrome include a hypotonic appearance with an open mouth, macrocephaly , upsweeping anterior scalp line, deep-set eyes, depressed nasal bridge , everted upper lip, and mild micrognathia .
What causes brain tumors? Many of the factors that contribute to a tumor forming in any other part of the body can contribute to the formation of a brain tumor. One significant factor is related ...
Twin-to-twin transfusion syndrome (TTTS), also known as feto-fetal transfusion syndrome (FFTS), twin oligohydramnios-polyhydramnios sequence (TOPS) and stuck twin syndrome, is a complication of monochorionic multiple pregnancies (the most common form of identical twin pregnancy) in which there is disproportionate blood supply between the fetuses.
Structural abnormalities of the brain are observable, physical damage to the brain or brain structures caused by prenatal alcohol exposure. Structural impairments may include microcephaly (small head size) of two or more standard deviations below the average, or other abnormalities in brain structure (e.g., agenesis of the corpus callosum ...
Hydranencephaly is an extreme form of porencephaly, which is characterized by a cyst or cavity in the cerebral hemispheres. [citation needed]Although the exact cause of hydranencephaly remains undetermined in most cases, the most likely general cause is by vascular insult, such as stroke, injury, intrauterine infections, or traumatic disorders after the first trimester of pregnancy.