Can lung cancer cause brain metastases?

These tumours contain lung cancer cells and are treated as metastatic lung cancer. Their effects depend on their location, size, surrounding swelling, and impact on brain function.

Cells can leave a lung tumour, travel in the bloodstream, and settle in brain tissue. A brain metastasis may disrupt the function controlled by the affected area or create swelling that raises pressure inside the skull.

Brain metastases from lung cancer can present with a new persistent headache, nausea, seizures, weakness on one side, balance difficulty, speech changes, vision changes, confusion, or personality changes. These symptoms also have non-cancer causes, so examination and imaging are needed to identify what is happening.

Tell the oncology team promptly about any new neurological symptom. Brain imaging can show whether there are lesions and whether swelling is present. The team considers the lung cancer type, molecular test results, symptoms, other sites of disease, and overall health when planning care.

Treatment may include medicine to reduce swelling, radiotherapy, surgery for selected lesions, or drug treatment that acts throughout the body. Anti-seizure medicine may be used when seizures occur. Do not drive after a seizure or sudden loss of awareness; follow local clinical and licensing advice before returning to driving.

Call emergency services for a first seizure, a seizure that continues or repeats without recovery, sudden facial droop, new arm or leg weakness, difficulty speaking, collapse, or loss of consciousness. Keep a person having a seizure away from hazards, cushion their head, and do not put anything in their mouth.

Seek urgent assessment for a rapidly worsening headache, repeated vomiting, increasing drowsiness, new confusion, loss of balance, or sudden vision change. These signs can reflect pressure or swelling in the brain and should not wait for a routine appointment.

Ask what the scan shows, whether swelling is affecting symptoms, and what each treatment is expected to achieve. Clarify which medicines to take at home, who to contact if symptoms change, and whether work, driving, flying, or physical activity needs temporary adjustment.