Kidney cancer, also known as renal cancer, is a group of cancers that starts in the kidney.Symptoms may include blood in the urine, lump in the abdomen, or back pain.Fever, weight loss, and tiredness may also occur.Complications can include spread to the lungs or brain.
The main types of kidney cancer are renal cell cancer (RCC), transitional cell cancer (TCC), and Wilms tumor.RCC makes up approximately 80% of kidney cancers, and TCC accounts for most of the rest.Risk factors for RCC and TCC include smoking, certain pain medications, previous bladder cancer, being overweight, high blood pressure, certain chemicals, and a family history.Risk factors for Wilms tumor include a family history and certain genetic disorders such as WAGR syndrome.Diagnosis maybe suspected based on symptoms, urine testing, and medical imaging.It is confirmed by tissue biopsy.
