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As with other organs, the kidneys can sometimes experience cancer. In adults, the type of kidney cancer is most commonly found renal cell carcinoma Derived from cells lining the renal tubules. The majority of renal tumors solid (Solid) is cancer, While the cyst (Fluid-filled cavities) are usually benign.

CAUSE
Under normal circumstances, cells in the urinary tract to grow and divide it appropriately. But sometimes the cells begin to divide out of control and produce new cells even though the body does not need it. This will cause the formation of a network consisting of a mass excess, which is known as a tumor.

Not all tumors are cancerous (malignant). Malignant tumors are called malignant tumor. The cells of this tumor infiltrate and destroy surrounding tissue. These cells are also out of the original tumor and enter the bloodstream or lymph system and will carry over into other parts of the body (a process known as metastases tumor).

cause of kidney cells is unknown, but studies have found certain factors that seem to increase the risk of kidney cancer. The risk of renal cell carcinoma increases with age. This cancer most often occurs at the age of 50-70 years. Men have 2 times greater risk than women.

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Other risk factors are:

* Smoke
* Obesity
* High blood pressure (hypertension)
* Work environment (charcoal fire workers in the steel mills are at high risk, as well as workers exposed to asbestos)
* Dialysis (Patient chronic renal failure undergoing chronic dialysis are at high risk)
* Irradiation


SYMPTOMS
In the early stages, kidney cancer rarely causes symptoms. In later stages, the most common symptoms are (Presence of blood in the urine). Can be known from the urine that looks pink or known through urine analysis. High blood pressure caused by inadequate blood flow to some part or the entire kidney, thereby triggering the release of chemical messengers to increase blood pressure.

Secondary occur due to high hormone levels erythropoietin, which stimulates bone marrow to increase red blood cell formation.

Other symptoms may occur:
- Pain in the affected kidney,
- Weight loss,
- Fatigue, and
- Intermittent fever.


Diagnosis
On physical examination, sometimes can be felt / felt a lump in the abdomen.

If kidney cancer is suspected, then do some of the following checks:

* Intravenous
* Ultrasound
* CT scan
* MRI can provide additional information regarding the spread of tumors.

If the tumor is a cyst, fluid samples can be taken for analysis. Aortografi and Renal artery angiography can be done in preparation for surgery to provide additional information about the tumor and the renal artery.