SYMPTOMS

Reddish or cloudy urine, although microscopic traces of blood may be evident in routine urine analyses before the urine changes color. While blood in the urine is usually a sihn of kidney infection, it can also be associated with cancer.
Dull pain in the abdomen, lower back, or side.
A detectable mass in the lower back that feels smooth and firm, but not tender.
With advanced kidney cancer, fatigue, intermittent low-grade fever, vomiting, appetite and weight loss, and a general sense of ill health.