What are Metastatic Brain Tumors?

Metastatic brain tumors occur when cancer spreads from another part of the body to the brain. Instead of starting in the brain, these tumors develop after cancer cells travel through the bloodstream or lymph system.

This type of brain tumor is more common in adults than tumors that begin in the brain. Treatment is often guided by the original cancer type as well as the tumor’s location in the brain.

Symptoms and Causes

Symptoms can vary depending on where the tumor is located and how large it is. Changes may happen gradually or appear suddenly.

Common symptoms include:

• Headaches that may worsen over time
• Trouble walking or keeping balance
• Difficulty speaking or understanding language
• Memory loss or confusion
• Mood or personality changes
• Weakness or numbness on one side of the body
• Vision problems
• Seizures
• Nausea or vomiting
• Increased drowsiness

Metastatic brain tumors develop when cancer cells spread from another part of the body. Cancers most often linked to brain spread include lung, breast, melanoma, kidney, and colon cancers. As cancer treatments improve and people live longer, the chance of cancer spreading to the brain can increase.

How is it diagnosed?

Doctors use a combination of imaging and testing to understand what’s happening in the brain. An MRI is often the first and most detailed scan used. CT or PET scans may also be performed to evaluate the brain and other areas of the body.

If needed, a small sample of the tumor may be removed for testing to confirm the diagnosis. Additional tests can help identify where the cancer started and guide treatment decisions.

How is it treated?

Treatment depends on the number of tumors, their location, and the type of cancer involved. Care usually begins with less invasive options and may progress as needed.

Common treatments include:

• Medications to reduce swelling, control seizures, and manage pain
• Radiation therapy, either targeting specific tumors or treating the whole brain
• Surgery to remove or reduce tumors when possible

In some cases, chemotherapy or other systemic treatments are used to address cancer throughout the body. When a cure isn’t possible, care focuses on easing symptoms and improving comfort.

Recovery and outlook vary from person to person. Many patients benefit from supportive care to maintain quality of life and daily function.