As an expert in the field of oncology, I can provide you with information on brain metastases. Brain metastases are secondary tumors that form in the brain from cancer cells that have spread from another part of the body. The survival rate and prognosis for patients with brain metastases can vary greatly depending on several factors, including the type and location of the primary cancer, the number of metastases, the patient's overall health, and the treatment options available. In the context you provided, it is mentioned that the median survival of patients with brain metastasis without a primary cancer identified is about 6 months. However, this does not mean that survival is not possible beyond this timeframe. Treatments such as surgery, whole-brain radiation therapy (WBRT), and in some cases, stereotactic radiosurgery, can be used to manage brain metastases. The combination of surgery and WBRT is a common therapeutic approach. It's important to note that while survival statistics can provide a general idea of what to expect, each patient's situation is unique, and individual outcomes can differ. Additionally, advancements in medical technology and treatment options are continually improving, which may offer new possibilities for patients with brain metastases. read more >>

Nevertheless, in 42% of cases, the origin remains unclear after extensive investigation. The median survival of patients with brain metastasis without a primary cancer is about 6 months; those with solitary lesions have a better prognosis. Surgery in combination of WBRT is the most common mode of therapy.read more >>