<prompt> All of the following are true about brain metastasis except:Frontal lobe is the most common siteLesions are located at the gray-matter and white-matter junctionMost common primary site is breast cancerChemotherapy can be used in brain metastases due to small cell lung cancer and seminomas  <response>: Mc brain tumor is Metastasis MC primary site for brain metastasis is Ca Lung Ca breast Frontal lobe is the most common site Lesions are located at the gray-matter and white-matter junction Treated with both Surgery and Radiotherapy whole brain Radiotherapy Chemotherapy is not helpful Exceptions: - Can be used in brain metastases due to small cell lung cancer and seminomas 