chiari malformation

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What is an arnold chiari malformation?

Result of ONTD.

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Chiari II malformation (CM-II), also known as Arnold-Chiari malformation, is a fetal condition characterized by downward displacement of the cerebellar vermis and tonsils, a brainstem malformation with beaked midbrain on neuroimaging, and a spinal myelomeningocele (open spina bifida). The spinal defect is the etiology of the Chiari II malformation of the cerebellum and brainstem.
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What's the arnold chiari malformation?

Chiary II.

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Chiari II malformation (CM-II), also known as Arnold-Chiari malformation, is a fetal condition characterized by downward displacement of the cerebellar vermis and tonsils, a brainstem malformation with beaked midbrain on neuroimaging, and a spinal myelomeningocele (open spina bifida).
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Dr. William Goldie answered:

What causes arnold chiari malformation?

No one knows

Chiari_malformation
Chiari described malformations of the cerebellum. Arnold added the defects in the brain associated with spina bifida. This became known as Chiari type 2 or Arnold Chiari. There is kinking of the medulla and fourth ventricle, obstruction of the outlet of the fourth ventricle, peaking of brainstem, fusion of thalamus, as well as hydrocephalus and incomplete closure of spinal cord.
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What is arnold chiari malformation type one?

Brain abnormality

Chiari_malformation
This is an abnormality that is usually congenital. The back lowest compartment in the skull is slightly inadequate in size to contain the brain. The back bottom part of the cerebellum called the cerebellar tonsils protrude through the skull opening that the spinal cord passes through. This can cause pressure on the brainstem and spinal cord which can cause symptoms.
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Dr. William Goldie answered:

Anyone operated on arnold chiari malformation?

Many times

Spina_bifida
Chiari type two is Arnold Chiari. It is associated with spina bifida, hydrocephalus, syrinx, and apnea. Aggressive surgical management is often necessary at birth and during early infancy. The anomaly can not be cured. Release of pressure is the only treatment.
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Dr. Kevin Teal answered:

What are the tests for Arnold-Chiari malformation?

Head/ Cervical MRI

Arnold-chiari_malformation
Chiari malformation is best diagnosed with a Head MRI without contrast to assess for the abnormal tonsil position and determine whether hydrocephalus, or water on the brain, is present also. A Cervical MRI without contrast can assess for a problem called a syrinx, or a fluid cavity in the center of the spinal cord. A Lumbar MRI without contrast can also exclude a tethered cord causing numb legs.
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Dr. Kevin Teal answered:

What are the symptoms of Arnold-Chiari malformation?

Headaches/dizziness

Dizziness
Most common symptom is headache. Other symptoms can include dizziness, unsteady gait, double vision, and passing out episodes. The headaches can be worse if there is straining.
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Dr. Kevin Teal answered:

What is the treatment for arnold-chiari malformation?

Open up space

Bone
Surgery is done to make more space around the cerebellar tonsils which have descended below a bony landmark called the Foramen Magnum. Bone is removed in the suboccipital area and extended down over the cervical bones as needed to take any bone over the tonsils off. The dura or covering over the tonsils can be opened and a patch sewn over the area to increase the space.
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Dr. Mohammed Zafar answered:

What sort of problem is an Arnold-Chiari malformation?

Brain malformation

Headache
Briana, A Chiari malformation is a downward congenital (from birth) displacement of the lowermost part of the a part of the brain (the cerebellum) through the opening in the base of the skull. Several types with no symptoms to multiple symptoms such as neck pain, headaches, dizziness, loss of balance, numbness of limbs. May be associated with other structural changes in the spinal cord or brain.
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What are the symptoms of an arnold chiari malformation?

Chiary II.

Arnold-chiari_malformation
Chiari II malformation (CM-II), also known as Arnold-Chiari malformation, is a fetal condition characterized by downward displacement of the cerebellar vermis and tonsils, a brainstem malformation with beaked midbrain, and a spinal myelomeningocele (open spina bifida). Symptoms: lower extremity paresis, hydrocephalus, bowel/bladder control impairement, inability to indipendently ambulate
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