What is Kidney Tumor

A kidney tumor is an abnormal mass that develops in a kidney. The kidney is a bean-shaped organ that functions as part of a person's urinary system. It helps to filter waste and extra fluids from the bloodstream, creating urine, which moves to the bladder and out of the body. People are born with two kidneys.

Kidney tumors form when cells overgrow within a kidney. Usually, older cells die and are replaced by new cells. When this process goes awry, the old cells don't die off, and new cells grow when they are not needed, creating a tumor. When a kidney tumor is benign, it is not cancerous and it does not spread to other body parts. However, tumors can sometimes impair organ function, so they may be removed surgically.

Kidney tumor usually rarely causes signs or symptoms in the early stages. As the kidney tumor develops into later stages, you may experience the following symptoms:

● blood in urine, which may seems dark urine or cola urine
● weight loss
● fatigue
● back pain
● mass or lump in abdomen
● swelling in leg or ankles