In some cases the patient will not know they have cancer until its too late, so know what symptoms to look out for is vital when it comes to any type tumor or cancer.However, before we go there, let's take a look at the known causes of brain cancer. The main known cause of such type of cancer is Addiume coatings, and other house wares that contain a substance called carcinogen. Patients who suffer from a long standing battle with melanoma, colon cancer, breast cancer, kidney cancer, and lung cancer are all at risk of being or getting secondary brain cancer.