Renal Mass and Localized Renal Tumors

The word renal means kidney. The words “tumor” and “mass” mean abnormal growths in the body. A renal mass, or tumor, is an abnormal growth in the kidney. Some renal masses are benign (not cancerous) and some are malignant (cancerous).

One in four renal masses are benign. Smaller masses are more likely to be benign. Larger masses are more likely to be cancerous. Some tumors can be slow to grow while some can be aggressive. Aggressive tumors form, grow and spread very quickly.

Most diagnosed kidney growths are small and localized masses. Localized means that the tumor has not spread out from where it first started. Around 40% of kidney cancers are localized renal masses. Masses may be solid or cystic (having fluid). Most cystic masses are benign.

What do we Know about Kidney Cancers?

Kidney and renal pelvis cancers are the 11th leading cause of cancer death in the U.S. Kidney cancer is 8th on the list of the 10 most common types of cancer. Almost all of the kidney cancers in the U.S. are renal cell carcinomas (RCC). These cancers form in the lining of the small tubes in the kidney.

Doctors are able to diagnose kidney cancer earlier because of better testing. Kidney cancer is more common in men than women. More men than women die from the disease. Kidney cancer is more common in African Americans, American Indians and Alaskan Native people. You can get kidney cancer at any age. But, it is more common in older people (those greater than 75 years old).

There will be more than 76,000 new cases of kidney cancer in the U.S. in 2021. Of those cases, nearly 14,000 people will likely die from the disease. The earlier the cancer is diagnosed-the better the chances of survival. The five-year survival rate for all kidney cancers is about 74%. If the cancer spreads over the body, then this rate falls to about 12%. The five-year survival for localized kidney and renal pelvis cancer is 92.5%.

Around the world, over 300,000 people get kidney cancer each year. Half of those people will die from the disease. But, less people are dying each year from the disease.