Description

• Renal tumors can be as small as 3 cm, or very large and consume the kidney. Other tumors form little finger-like projections, called papillae.
  
  

Types

• There are many types of renal tumors; however, renal cell carcinoma is the most common type in adults. It occurs most often in men ages 50 to 70.
  
  

Causes

• The causes of renal tumors (kidney cancer) are unknown.
  
  

Symptoms

• Symptoms may include back pain; swelling in the feet, hands or face; feeling sick to your stomach; feeling tired or dizzy often; high blood pressure without cause; bloody or dark-colored urine; and a change in how often your urinate. According to the American Kidney Fund, most kidney problems have no symptoms until they are too far along.
  
  

Risk Factors

• Although anyone can develop kidney problems, a person is at higher risk if he is African-American, Hispanic, Native American, or Asian. Other risk factors include diabetes, obesity, tobacco, high blood pressure, hereditary or over the age of 60.