Brain metastasis
Brain metastasis
Brain metastasis (pronunciation: /ˈbreɪn mɛˈtæstəsɪs/) is a condition where cancer cells spread from their original site to the brain.
Etymology
The term "metastasis" is derived from the Greek "metastasis" meaning "removal from one place to another". The prefix "meta-" means "change" and "stasis" means "place".
Definition
Brain metastasis is a type of secondary cancer, meaning the cancer originated elsewhere in the body and spread to the brain. This is different from primary brain tumors, which start in the brain. Brain metastases are more common than primary brain tumors and are often a sign that cancer is advanced.
Causes
Any cancer can spread to the brain, but the most common types include lung cancer, breast cancer, melanoma, kidney cancer, and colorectal cancer. The cancer cells break away from the original tumor, travel through the bloodstream or lymphatic system, and grow in the brain.
Symptoms
Symptoms of brain metastasis can vary depending on the location and size of the tumor. Common symptoms include headaches, seizures, nausea, vomiting, behavioral changes, and neurological deficits such as weakness or difficulty speaking.
Diagnosis
Diagnosis of brain metastasis typically involves imaging tests such as MRI or CT scan, and sometimes a biopsy to confirm the diagnosis and identify the type of cancer.
Treatment
Treatment for brain metastasis depends on the type and stage of the original cancer, the size and location of the brain metastasis, and the patient's overall health. Options may include surgery, radiation therapy, chemotherapy, targeted therapy, or a combination of these.
Prognosis
The prognosis for brain metastasis varies widely and depends on many factors, including the type and stage of the original cancer, the number and location of brain metastases, and the patient's overall health and response to treatment.
External links
- Medical encyclopedia article on Brain metastasis
- Wikipedia's article - Brain metastasis
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