Kidney cancer is a malignant tumour that involves the uncontrolled spread of cancer cells in the renal tubules. It is a disorder that affects, above all, adults over 50 and generally men. The most common risk factors are smoking, haemodialysis and other genetic reasons (the exact causes are unknown). The symptoms of a kidney tumour are usually the appearance of blood in the urine, pain in the lower back (near the diseased kidney), weight loss and gain of abdominal mass. However, most kidney tumours are asymptomatic, and are usually detected at random from an X-ray test performed for other reasons. It is a cancer that if detected in time can be cured, because of the body's ability to continue as normal with a single kidney, so the removal of the damaged organ will stop the cancer. However, in case of metastases (tumour spread to other organs), other specific treatments must be performed to halt the spread of cancer cells.