Chiari malformation is a structural defect in the cerebellum, the part of the brain that controls balance and coordination. In Chiari malformation, part of the cerebellum is located lower than normal in the skull. This can cause pressure on the cerebellum and the brainstem, leading to a variety of symptoms.
The answer to the question of whether Chiari malformation can change is complex. In some cases, the malformation may remain relatively stable over time, while in others, it may progress. Factors such as age, the type of Chiari malformation, and the amount of pressure on the brainstem can all affect whether the malformation changes.
For example, in children, the malformation may not change significantly over time. On the other hand, in adults, the malformation may become more pronounced as the skull becomes more rigid. Additionally, in cases of Chiari 1 malformation, which is caused by a bony abnormality in the base of the skull, the malformation may not change in size, but the brainstem may be compressed over time, leading to an increase in symptoms. In Chiari 2 malformation, which is caused by a narrowing of the spinal space, the malformation may change in size as the spinal canal narrows.
In general, Chiari malformation can change over time, depending on the factors mentioned above. It is important to note, however, that even if the malformation does not change, symptoms can still increase as a result of the pressure placed on the brainstem. Therefore, it is important to stay up to date on regular check-ups and MRI scans to monitor for any changes or progression of the malformation.