For some cancers an unexplained lump may appear on the skin (tumor). Most cancers are internal and the range of symptoms is astronomically vast. Cancer of the liver may present Jaundice or discomfort. Cancer of the stomach will cause vomiting. Skin cancer will appear as either a lump or ABCD* mole. Brain cancer is very misleading. As the brain is in charge of the whole body, there can be practically any symptom. Some cancers cause pain. IF YOU ARE WORRIED ABOUT THIS DISEASE, I URGE YOU TO CONSULT A DOCTOR IMMEDIATELY. Chances are that the lesion is benign, but it may be malignent.