CLINICAL MEDICINE

Detailed explanation-1: -They commonly go to the part of the brain called the cerebral hemispheres or to the cerebellum, where they form a mass. Some metastatic brain tumors appear many years after the primary cancer. Others metastasize so quickly that they are identified before the primary cancer.

Detailed explanation-2: -Any cancer can spread to the brain, but the types most likely to cause brain metastases are lung, breast, colon, kidney and melanoma. Brain metastases may form one tumor or many tumors in the brain.

Detailed explanation-3: -The most common origins of brain metastasis are systemic cancer of the lung, breast, skin, or GI tract.

Detailed explanation-4: -Metastatic brain tumors are the most common brain tumor in adults. An estimated 200, 000 to 300, 000 people are diagnosed with metastatic cancer each year. Most people with cancer develop metastatic brain cancer between ages 45 and 65, with most cases developing in people age 65 and older.