Several types of cancer can develop in the kidneys. Renal cell carcinoma (RCC), the most common form, accounts for approximately 85% of all cases. In RCC, cancerous (malignant) cells develop in the lining of the kidney’s tubules and grow into a mass called a tumor. In most cases, a single tumor develops, although more than one tumor can develop within one or both kidneys. Early diagnosis of kidney cancer is important. As with most types of cancer, the earlier the tumor is discovered, the better a patient’s chances for survival.
Common symptoms of kidney cancer may include:
- Blood in the urine (The urine typically appears to be deep red or rusty in color – hematuria)
- Abdominal mass or lump
- Pain in the side or lower back
- Persistent fatigue
- Rapid, unexplained weight loss
- Swelling in the legs or ankles