What is mega cisterna magna in fetus?
What is mega cisterna magna in fetus?
On antenatal ultrasound, mega cisterna magna refers to an enlarged retrocerebellar CSF space: usually >10 mm (some consider up to 12 mm within normal limits) septa may be seen within a mega cisterna magna, which are thought to be Blake pouch vestigial remnants.
Is enlarged cisterna magna normal?
Our results suggest that isolated enlargement of the cisterna magna to more than 10 mm is associated with normal pregnancy and neonatal outcome.
Is Mega cisterna magna common?
A mega cisterna magna occurs in approximately 1% of all brains imaged postnatally, and has been associated with infarction (however this may be due to the fact that the cerebellar hemispheres are globally small following infarction), CMV infection and chromosomal abnormalities, especially trisomy 18.
What does prominent cisterna magna mean?
Mega cisterna magna refers to a normal variant characterized by a truly focal enlargement of the CSF-filled subarachnoid space in the inferior and posterior portions of the posterior cranial fossa. It is an incidental finding on neuroimaging, and no imaging follow up is necessary.
What causes enlarged cisterna magna?
usually >10 mm (some consider up to 12 mm within normal limits)
What are symptoms of prominent cisterna magna?
dislocation, and polydactyly), respiratory, gastrointestinal (umbilical and inguinal hernia), central nervous system (cerebral and cerebellar atrophy, mega cisterna magna, mental motor retardation, convulsions, corpus callosum dysgenesis, cranial bone [hindawi.com]
What is prominent cisterna magna?
Cisterna magna is a large cistern between the cerebellum and medulla (parts of the brain). Cistern is a CSF (cerebrospinal fluid) filled space in a brain. Cisterna magna is the biggest CSF filled space in brain. Prominent cisterna magna is a slight larger (more than normal) cisterna magna.
What is a large cisterna magna?
The cisterna magna, an opening in the subarachnoid cavity in the brain, is so named because of its large size. In fact, it is the largest of the openings that can be found in this gap of the central nervous system. The cisterna magna is also known as the cerebellomedullary cistern.