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.
The exact cause of kidney cancer is unknown, but certain risk factors are linked to the disease (a risk factor is anything that increases a person's chance of getting a disease). Different cancers have different risk factors.Some risk factors are under your control (smoking); others are not (gender and race).n the early stages, renal cell cancer usually causes no clear signs or symptoms. However, as the tumor grows, symptoms may include: 1  Blood in the urine (hematuria). 2  A lump or mass in the area of the back near the kidneys.