What is kidney cancer?Kidney most cancers is the peculiar increase of cells in your kidney tissue. In time, these cells structure a mass known as a tumor. Cancer starts offevolved when some thing triggers a exchange in the cells, and they divide out of control. A cancerous or malignant tumor can unfold to different tissues and essential organs. When this happens, it’s called metastasis. What is kidney cancer? Kidney cancer is cancer that starts in the cells of the kidney. The most common type of kidney cancer is renal cell carcinoma (RCC), accounting for about 90% of all cases. Usually only one kidney is affected, but in rare cases the cancer may develop in both kidneys. Receiving a kidney cancer diagnosis can be scary, saddening and frustrating. Like most cancers, kidney cancer treatment is more effective when it’s diagnosed early on. Your healthcare provider can talk with you about your treatment and give you additional resources to help you understand your options. You may also want to join a local support group or seek the help of a counselor or social worker. These things can help you maintain a healthy emotional outlook during this challenging time.