1 Blood in the urine (hematuria). 2 Low back pain on one side (not caused by injury). 3 A mass (lump) on the side or lower back. 4 Fatigue (tiredness). 5 Loss of appetite. 6 Weight loss not caused by dieting. 7 Fever that is not caused by an infection and that doesn’t go away.
Signs and symptoms of kidney cancer. Early kidney cancers do not usually cause any signs or symptoms, but larger ones might. Some possible signs and symptoms of kidney cancer include: 1  Blood in the urine (hematuria). 2  Low back pain on one side (not caused by injury). 3  A mass (lump) on the side or lower back. 4  Fatigue (tiredness). 5  Loss of appetite. 6  Weight loss not caused by dieting. 7  Fever that is not caused by an infection and that doesn’t go away. Symptoms. Kidney cancer rarely causes signs or symptoms in its early stages. In the later stages, kidney cancer signs and symptoms may include: 1  Blood in your urine, which may appear pink, red or cola colored. 2  Back pain just below the ribs that doesn't go away. 3  Weight loss. 4  Fatigue. 5  Intermittent fever.
http://www.cancer.org/cancer/kidneycancer/detailedguide/kidney-cancer-adult-signs-and-symptoms http://www.mayoclinic.org/diseases-conditions/kidney-cancer/basics/symptoms/CON-20024753
symptoms of kidney cancer in adults