Does brain metastases cause first-time seizure?

A seizure may happen when a metastatic tumour or surrounding swelling disrupts electrical activity in the brain. The symptom alone cannot identify the cause, so prompt assessment is needed.

A seizure is not always full-body shaking. It may cause staring, loss of awareness, unusual sensations, repeated movements, sudden stiffness, or jerking in one part of the body. Afterwards, the person may be sleepy, confused, weak, or have difficulty speaking.

In someone with known cancer, clinicians consider the cancer history alongside medicines, infection, blood chemistry changes, and other neurological causes. Brain imaging and blood tests may be part of the assessment.

Move hard or sharp objects away, cushion the head, loosen tight clothing around the neck, and note when the seizure starts. When movements stop, place the person on their side if you can do so safely and stay with them.

Do not restrain the person, put anything in their mouth, or offer food, drink, or medicine until they are fully alert. Arrange urgent medical assessment after any first seizure.

Call emergency services now for a first seizure. Immediate help is especially critical if movements continue for several minutes, another seizure follows before recovery, breathing is difficult, an injury occurred, or the person remains unusually unresponsive.

New weakness, severe headache, repeated vomiting, confusion, vision change, or trouble speaking also requires urgent attention. Do not let the person drive themselves for assessment.

Ask what may have triggered the seizure, whether brain imaging shows swelling or a metastatic tumour, and whether anti-seizure medicine or treatment for swelling is needed.

Confirm what to do if another episode occurs, when to call emergency services, and which activities such as driving, swimming alone, heights, or operating machinery should be avoided.