More. 1  Oxygen Levels and Brain Function The brain consumes about 25 percent of a personâs oxygen intake, so proper brain function requires enough blood oxygen. 2  How Oxygen Affects the Heart The heart is a key player in making sure oxygenated blood travels to the organs and tissues that need it.
Other possible kidney cancer symptoms may include: 1  Flank pain - Pain on one side of the body between the upper abdomen and the back. 2  Abdominal Mass - a mass in the area of the kidneys discovered during an examination. 3  Anemia - a condition in which the number of red blood cells is below normal.  Fever - not due to cold or flu.
You may have one or more of these kidney cancer symptoms 1  : Blood in your urine. 2  A lump in your side or abdomen. 3  A loss of appetite. 4  A pain in your side that doesn't go away. 5  Weight loss that occurs for no known reason. 6  Fever that lasts for weeks and isn't caused by a cold or other infection. 7  Extreme fatigue. 8  Anemia.