Glioblastoma

Glioblastoma, sometimes called GBM, is a cancerous tumour that starts in the brain. It can affect areas responsible for movement, speech, memory, vision or behaviour, so symptoms vary with its location and size. The condition can change quickly and needs assessment by a specialist team.

A first-time seizure is a very common presentation of glioblastoma. Persistent headache is also a very common presentation, particularly when it is new or changing. Other possible features include nausea, vomiting, weakness on one side, changes in speech or vision, confusion, personality change, or difficulty with balance. These symptoms have many possible causes; a symptom alone does not establish a tumour diagnosis.

Glioblastoma develops when brain cells acquire changes that make them grow and survive abnormally. In most people, the precise reason those changes occur is not known. It is not caused by something a person has done, and it cannot be diagnosed from symptoms alone.

Glioblastoma may enlarge within the brain and place pressure on nearby tissue. Its effects depend on the brain region involved, and symptoms can become more noticeable as swelling or tumour growth changes brain function. The care team uses examination and imaging to monitor the condition and adjust care.

There are few established factors that predict who will develop glioblastoma. Increasing age is associated with greater likelihood, while rare inherited conditions can raise risk. Most people diagnosed have no identifiable inherited or lifestyle explanation.

Assessment usually begins with a neurological examination and brain imaging, often magnetic resonance imaging. A tissue sample obtained during surgery or biopsy is examined to identify the tumour type and useful molecular features. Your team may discuss whether further scans are needed to plan treatment.

Treatment is tailored to the tumour’s location, molecular findings, overall health and personal priorities. Brain tumour surgery may remove as much tumour as safely possible or obtain tissue. Radiotherapy and chemotherapy may then target remaining tumour cells. Clinical trials can be discussed when an appropriate study is available.

Support may include rehabilitation for movement, speech or thinking changes, help with fatigue and practical planning, and emotional support for you and your family. Keep a written list of medicines and new symptoms, and tell the team promptly about worsening headaches, seizures, confusion or new weakness.

Complications can include seizures, brain swelling, weakness, communication difficulties, changes in alertness and side effects from treatment. A seizure lasting longer than expected, repeated seizures without recovery, severe drowsiness or sudden new weakness needs urgent medical attention.

There is no established routine screening test or reliable way to prevent most glioblastomas. Knowing warning symptoms and seeking prompt assessment can help a brain tumour be investigated when concerns arise.

Look for a multidisciplinary neuro-oncology team that includes neurosurgery, oncology, neuroradiology, pathology and rehabilitation expertise. Ask who will coordinate your care, how treatment goals will be reviewed, and whom to contact outside appointments.