Causes and Risk Factors for Kidney Cancer

Kidney cancer develops when normal renal cells acquire genetic changes that cause them to grow and divide uncontrollably. While the exact trigger for these cellular changes is often unknown, specific health, environmental, and lifestyle factors can significantly increase an individual's risk. Renal cell carcinoma (RCC) is the most common form of the disease, accounting for approximately 90% of all diagnoses.

Understanding your risk profile is an essential step in maintaining long-term renal health and identifying when specialized screening or clinical evaluation is necessary.

What Causes Kidney Cancer?

At a cellular level, kidney cancer begins when mutations disrupt the normal instructions within a cell's DNA. These abnormal instructions cause kidney cells to survive past their normal lifecycle and multiply rapidly, forming a mass or tumor. Over time, these malignant cells can invade surrounding renal tissue or enter the bloodstream and lymphatic system to spread elsewhere in the body.

Researchers believe kidney cancer causes are rarely single events. Instead, they typically stem from a cumulative combination of genetic susceptibility, long-term toxic exposures, and ongoing cellular stress on the kidney tissues as they filter waste products from the blood over many years.

Which Kidney Cancer Risk Factors are Modifiable?

Modifiable risk factors are lifestyle choices or underlying health conditions that you have the power to manage or change. Taking action to address these factors can proactively lower your risk of developing kidney cancer:

• Tobacco use: Smoking cigarettes, cigars, or pipes is one of the most significant and preventable risk factors. Toxic chemicals in tobacco enter the bloodstream and damage kidney tissues as waste is filtered, effectively doubling the risk of developing renal cell carcinoma.
• Obesity: Excess body weight alters hormone levels and causes chronic, systemic inflammation. Researchers believe these biological processes create an environment that promotes tumor growth.
• High blood pressure: Hypertension places chronic mechanical strain on renal blood vessels. Managing blood pressure through healthy habits and appropriate medical treatment minimizes this cellular strain.
• Pain relievers (NSAIDs): Long-term, heavy use of certain over-the-counter pain medications, specifically nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen, has been linked to an increased risk of kidney damage and kidney cancer.
• Occupational chemical exposure: Long-term workplace exposure to harmful substances, such as trichloroethylene and certain industrial solvents, increases risk. Following strict workplace safety guidelines mitigates this danger.

Which Kidney Cancer Risk Factors are Non-Modifiable?

Nonmodifiable risk factors are biological or genetic realities that cannot be changed. While you cannot alter them, understanding these factors helps you and your doctor know if you would benefit from closer monitoring or earlier evaluations:

• Age and sex: Kidney cancer is most frequently diagnosed in adults older than 60. Additionally, for reasons that are not yet fully understood, men develop kidney cancer at nearly twice the rate of women.
• Race and ethnicity: Statistically, African Americans, American Indians, and Alaskan Natives have a slightly higher risk of developing renal cell carcinoma compared to Caucasians or Asian Americans.
• Family history: Having a close, first-degree relative (such as a parent or sibling) with kidney cancer increases your risk, particularly if multiple family members are affected or if they were diagnosed at a young age.
• Inherited genetic syndromes: Certain rare hereditary conditions carry a high predisposition for kidney tumors. These include von Hippel-Lindau (VHL) disease, Birt-Hogg-Dubé syndrome, and hereditary papillary renal cell carcinoma.
• Existing kidney dysfunction: Individuals with a history of chronic kidney disease, those who have been on long-term dialysis treatment, or individuals who have already had a previous kidney cancer diagnosis face a naturally elevated risk.

Can Kidney Cancer be Prevented?

There is no guaranteed way to completely prevent kidney cancer, but addressing your modifiable risk factors offers powerful protection. Managing underlying health conditions, such as keeping your blood pressure within a healthy target range and staying physically active to maintain a healthy weight, reduces metabolic stress on kidney cells. Most importantly, avoiding tobacco in all forms remains the single most effective step an individual can take to protect their kidneys from harmful chemical damage.

Frequently Asked Questions About Kidney Cancer Causes & Risk Factors

• Does having a family member with kidney cancer mean I will get it?

  Not necessarily. The vast majority of kidney cancers occur randomly due to acquired gene mutations. However, having a first-degree relative (parent, sibling, or child) with kidney cancer does double your risk, making it important to share this history with your primary care physician.

• How does high blood pressure raise kidney cancer risk?

  Chronic hypertension damages renal blood vessels, leading to tissue hypoxia (oxygen deprivation) and inflammation. This sustained cellular strain makes kidney tissue more susceptible to the genetic mutations that can lead to cancer.

• If I stop smoking, does my kidney cancer risk go down?

  Yes. While it takes time for damaged tissues to recover, research shows that quitting smoking leads to a progressive reduction in kidney cancer risk over time compared to individuals who continue to smoke.

• Should I undergo genetic testing for kidney cancer?

  Genetic counseling and testing are typically recommended if you are diagnosed with kidney cancer under age 50, have tumors in both kidneys, have multiple family members with renal cancer, or have physical signs associated with inherited syndromes like von Hippel-Lindau disease.

• Can drinking more water or changing my diet prevent kidney cancer?

  While there is no specific "kidney cancer diet," staying well-hydrated helps your kidneys efficiently filter toxins from your blood. Eating a balanced diet is crucial because it helps prevent obesity and high blood pressure, which are two of the most significant modifiable risk factors for developing the disease.

Find the help you need for kidney cancer at Moffitt Cancer Center

Understanding the causes and risk factors for kidney cancer can help you make informed decisions about your health and recognize when further evaluation may be needed. As a National Cancer Institute (NCI)-designated Comprehensive Cancer Center, Moffitt is committed to advancing kidney cancer research, diagnosis and treatment through innovative science and patient-centered care.

If you would like to learn more about kidney cancer causes and risk factors, you can request an appointment with a specialist in the Urologic Oncology Program at Moffitt by calling 1-888-663-3488 or submitting a new patient registration form online. We do not require referrals.