The tumor and the treatment may cause symptoms that continue after treatment ends.

Signs or symptoms caused by the tumor may begin before the cancer is diagnosed and continue for months or years. It is important to talk with your child's doctors about signs or symptoms caused by the tumor that may continue after treatment.

Cancer treatments can cause side effects. Which side effects your child might have depends on the type of treatment they receive, the dose, and how their body reacts. Talk with your child's treatment team about which side effects to look for and ways to manage them.

To learn more about side effects that begin during treatment for cancer, visit Side Effects.

Problems from cancer treatment that begin 6 months or later after treatment and continue for months or years are called late effects. Late effects of cancer treatment may include:

Children diagnosed with medulloblastoma may have certain problems after surgery or radiation therapy, such as changes in the ability to think, learn, and pay attention. Also, cerebellar mutism syndrome may occur after surgery. Signs of this syndrome include:

Some late effects may be treated or controlled. It is important to talk with your child's doctors about the effects cancer treatment can have on your child and the types of symptoms to expect after cancer treatment has ended. Learn more about Late Effects of Treatment for Childhood Cancer.