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| ==Overview== | | ==Overview== |
| | | [[Category: (Name of the system)]] |
| There are no MRI findings associated with [disease name].
| | MRI may be helpful in the diagnosis of Arnold-Chiari malformation. Findings on MRI diagnostic of Arnold-Chiari malformation include cerebellar tonsillar herniation, wedge shaped tonsils, [[syringohydromyelia]], small [[posterior fossa]], obstructive [[hydrocephalus]], and brainstem anomalies. |
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| OR
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| [Location] MRI may be helpful in the diagnosis of [disease name]. Findings on MRI suggestive of/diagnostic of [disease name] include [finding 1], [finding 2], and [finding 3].
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| OR
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| There are no MRI findings associated with [disease name]. However, a MRI may be helpful in the diagnosis of complications of [disease name], which include [complication 1], [complication 2], and [complication 3].
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| ==MRI== | | ==MRI== |
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| There are no MRI findings associated with [disease name].
| | MRI may be helpful in the diagnosis of Arnold-Chiari malformation. Findings on MRI diagnostic of Arnold-Chiari malformation include: |
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| OR
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| [Location] MRI may be helpful in the diagnosis of [disease name]. Findings on MRI suggestive of/diagnostic of [disease name] include:
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| *[Finding 1]
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| *[Finding 2]
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| *[Finding 3]
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| OR
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| There are no MRI findings associated with [disease name]. However, a MRI may be helpful in the diagnosis of complications of [disease name], which include:
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| *[Complication 1]
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| *[Complication 2]
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| *[Complication 3]
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| ==References==
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| {{Reflist|2}}
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| {{WH}}
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| {{WS}}
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| [[Category: (Name of the system)]]
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| ==MRI==
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| * [[MRI]] is the imaging modality of choice to evaluate for a Chiari I malformation. MRI findings:
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| **[[Cerebellar]] tonsillar herniation
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| **Wedge shaped tonsils
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| **[[Syringohydromyelia]]
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| **Small [[posterior fossa]]
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| **Obstructive [[hydrocephalus]]
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| **[[Brainstem]] anomalies
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| *Tonsillar displacement is measured from the basion-opisthion line on a sigittal image.
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| *Herniation is usually at least 5mm, though patients with 3-5mm herniation may also have the malformation.
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| *MRI CSF flow studies may prove to be helpful and are currently under investigation.
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| <gallery>
| | *[[Cerebellar]] tonsillar herniation |
| Image:Chiari 1 malformation 001.jpg|Sag T2
| | *Wedge shaped tonsils |
| Image:Chiari 1 malformation 002.jpg|Sag T1
| | *[[Syringohydromyelia]] |
| Image:Chiari 1 malformation 003.jpg|Sag T1
| | *Small [[posterior fossa]] |
| Image:Chiari 1 malformation 101.jpg|Sag T1
| | *Obstructive [[hydrocephalus]] |
| Image:Chiari 1 malformation 102.jpg|Sag T2
| | *[[Category: (Name of the system)]] [[Brainstem]] anomalies |
| Image:Chiari 1 malformation 103.jpg|Ax T2
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| Image:Chiari 1 malformation 104.jpg|Ax T2
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| Image:Chiari 1 malformation 105.jpg|Ax T2
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| Image:Arnold-Chiari Malformation MRI 0001.jpg|Brain: Arnold Chiari I; T1 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0003.jpg|Brain: Arnold Chiari I, with Hydromyelia of Cervical Spinal Cord; T1 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0007.jpg|Brain: Arnold Chiari II, with Towering of The Cerebellum and Wide Tentorial Incisure; T1 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0008.jpg|Brain: Arnold Chiari II, with Fenestrated Falx Cerebri and Interdigitating Gyri; T2 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0009.jpg|Brain: Arnold Chiari II, with Tectal Beaking and Large Massa Intermedia and Stenogyria; T1 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0010.jpg|Brain: Arnold Chiari Type II with Medullary Spur and Kink (MRI)
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| Image:Arnold-Chiari Malformation MRI 0011.jpg|Brain: Arnold Chiari II, with Hypoplastic Corpus Callosum; T1 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0012.jpg|Brain: Arnold Chiari II, with Cerebellar Hemispheres that Creep Anteriorly Around the Brain Stem; T1 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0013.jpg|BRAIN: ARNOLD CHIARI II (MRI)
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| Image:Arnold-Chiari Malformation MRI 0014.jpg|BRAIN: ARNOLD CHIARI II WITH ELONGATED FOURTH VENTRICLES AND STENOGYRIA; T1 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0015.jpg|BRAIN: ARNOLD CHIARI II WITH HYPOPLASTIC CORPUS CALLOSUM AND STENOGYRIA; T1 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0016.jpg|BRAIN: ARNOLD CHIARI II WITH REPAIRED MYELOMENINGOCELE AND TETHERED SPINAL CORD; T1 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0017.jpg|BRAIN: ARNOLD CHIARI TYPE IV; T1 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0018.jpg|BRAIN: ARNOLD CHIARI TYPE IV; T1 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0019.jpg|BRAIN: ARNOLD CHIARI MALFORMATION II; 1/2 PCMC (MRI)
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| Image:Arnold-Chiari Malformation MRI 0020.jpg|BRAIN: ARNOLD CHIARI MALFORMATION II, HERNIATED CEREBELLAR TONSIL; 1/2 PCMC - ARROW (MRI)
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| Image:Arnold-Chiari Malformation MRI 0021.jpg|SPINAL CORD: ARNOLD CHIARI MALFORMATION II; 2/2 PCMC (MRI)
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| Image:Arnold-Chiari Malformation MRI 0022.jpg|SPINAL CORD: ARNOLD CHIARI MALFORMATION II; 2/2 PCMC - ARROW (MRI)
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| Image:Arnold-Chiari Malformation MRI 0023.jpg|BRAIN: ARNOLD CHIARI MALFORMATION; 1/3 T2 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0024.jpg|BRAIN: ARNOLD CHIARI MALFORMATION; 1/3 - ARROW T2 (MRI)
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| Image:Arnold-Chiari Malformation MRI 0025.jpg|BRAIN: ARNOLD CHIARI MALFORMATION; 2/3 T2 (MRI)
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| </gallery>
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| ==References== | | ==References== |