The risk of surgery is not large, but it is a matter of probability, and once an adverse event occurs, it is not good.
The biggest risk is cerebral hemorrhage, because after all, this is to separate the blood vessels, sometimes improper operation or the scope of operation is too large, it is easy to cause cerebral hemorrhage due to the damage of the entire blood vessels, although the probability is very low, but once it appears, it is not good.
In particular, this is the posterior fossa where it is adjacent to the brainstem, cerebellum. Once the amount of bleeding is relatively large, it is easy to cause a series of very rapid changes such as comatose breathing, cardiac arrest, etc., and it may even cause adverse conditions for patients before they can react.
The second risk is cerebral infarction caused by damage to blood vessels.
In the same way, in the process of injury and separation of blood vessels, if the blood vessels are damaged or vasospasm occurs in the later stage, it is easy to make the blood vessels narrow or even occluded, and then the peripheral nerve cells lack blood supply, and eventually form cerebral infarction.
Like cerebral hemorrhage, because it is close to the brainstem and cerebellum, it can easily cause very serious disabling and fatal.
Another risk is the risk of intracranial infection, which is much smaller, but not easy to ignore.
Another is the failure of surgery, such as the situation of re-operation in the later stage, or the situation that the operation is ineffective, which is closely related to the skills of the operation, so it is recommended to go to a big hospital for surgery**.
But let's be honest, in clinical work. It is true that the occurrence of adverse events is a matter of probability, some do not occur anyway, but some adverse events occur at the slightest touch.
If there are relevant questions in the follow-up, further consultation will be made in a timely manner.