Steroids occur naturally within our bodies, but can also be made in the laboratory for medical purposes. They help reduce inflammation and control different functions in our bodies such as the immune system or the way the body uses food. One of their key functions is to reduce inflammation/swelling and ease associated symptoms, such as headaches.
When your child has a tumour in their brain it is not only the tumour itself that causes some of the symptoms they may have, but also the swelling surrounding the tumour. This swelling puts pressure on surrounding tissues making the effects of the tumour wider reaching. This pressure can cause symptoms such as headaches, sickness and seizures (fits).
To help reduce the swelling, Children with Cancer may be prescribed steroids such as Prednisone or Dexamethasone as part of their treatment. As steroids are fast-acting drugs this could mean that some of the effects caused by the tumour reduce quite quickly. This does not mean, however, that the size of tumour itself has been reduced.