Brain Cancer

What Is Brain Cancer?

The brain and spinal cord make up the central nervous system. When cells in this system grow in an uncontrolled way, they can form a tumor.

Primary brain tumors start within the brain or its surrounding structures. Metastatic brain tumors begin in another organ, such as the lung or breast, and then spread to the brain.

The word "cancer" usually points to malignant tumors, which grow faster and can spread within the brain or spinal cord. Benign tumors are not cancer, but they may still need treatment if they press on important areas.

What Causes Brain Cancer?

In most cases, the exact cause of a brain tumor is not known. Researchers believe it develops when genetic changes cause brain cells to grow and divide abnormally.

These changes are usually not inherited and happen during a person's lifetime. A small number of brain tumors are linked to inherited conditions or to known exposures, which are covered under risk factors below.

Types of Brain Cancer

Brain tumors are named after the cells they start in. Common types include:

• Gliomas: Tumors that begin in glial cells. This group includes glioblastoma, the most common malignant primary brain tumor in adults, along with astrocytoma and oligodendroglioma.

• Meningiomas: Tumors of the membranes covering the brain. Most are benign and slow-growing.

• Pituitary tumors: Growths in the pituitary gland that can affect hormone levels.

• Medulloblastoma: A fast-growing tumor seen more often in children.

• Schwannomas and CNS lymphoma: Less common tumor types that follow their own treatment paths.

Brain Cancer Symptoms

Brain tumor symptoms depend on the size and location of the tumor. They may build up slowly or appear suddenly. Common signs include:

• Headaches that are new, persistent, or worse in the morning
• Seizures, especially in someone with no history of them
• Nausea or vomiting with no clear cause
• Vision, hearing, or speech changes
• Weakness or numbness on one side of the body
• Problems with balance or coordination
• Changes in memory, concentration, mood, or personality

Many of these symptoms can also come from far less serious conditions. What matters is persistence. Symptoms that are new, recurring, or steadily worsening should be evaluated by a doctor.

Brain Cancer Risk Factors

Risk factors are conditions that may raise the chance of developing a brain tumor. Known factors are as follows:

• Age, since some tumor types are more common in older adults and others in children
• Previous exposure to ionizing radiation, such as earlier radiation therapy to the head
• Inherited conditions, including neurofibromatosis, Li-Fraumeni syndrome, von Hippel-Lindau disease, and Turcot syndrome
• A family history of brain tumors, in a small number of cases

There is no strong scientific evidence that mobile phone use causes brain tumors.

How Is Brain Cancer Diagnosed?

There is no routine screening test for brain cancer in people without symptoms. Diagnosis usually begins when symptoms prompt a medical visit. The process may include:

• Neurological exam: Checks vision, hearing, balance, coordination, reflexes, and strength.
• MRI: The preferred imaging test for viewing the brain in detail.
• CT scan: Often used when an MRI is not suitable or in urgent situations.
• Biopsy: A small tissue sample is examined under a microscope to confirm the tumor type and grade.
• Molecular testing: Studies the tumor's genetic features, which can help guide treatment decisions.

Can Brain Cancer Be Cured?

The outlook depends heavily on the type, grade, and location of the tumor and on how much can be safely removed. Some benign and low-grade tumors can be removed completely and may not return.

Higher-grade tumors, such as glioblastoma, are more difficult to treat, though surgery, radiation, and medicines can help control the disease and manage symptoms. Each situation is different, and an oncologist can explain what the findings mean in a specific case.

Choose Specialized Neuro-Oncology Care at HCG Cancer Hospital

Brain tumors are complex, and care works best when it is coordinated. At HCG Cancer Hospital, neuro-oncology teams bring together neurosurgeons, medical and radiation oncologists, pathologists, and supportive care specialists, along with advanced imaging and treatment options, within a single care setting.

If you or a family member is experiencing persistent neurological symptoms, speak with a qualified specialist for proper evaluation. Early assessment helps guide timely and appropriate care.