Causes and Risk Factors for Renal Cell Carcinoma
Renal cell carcinoma (RCC), the kidney’s most frequently diagnosed cancer type, develops when kidney cells begin to grow and divide abnormally. Understanding the factors that contribute to its development can support prevention and early detection.
Key Takeaways
- Renal cell carcinoma causes are multifactorial, combining lifestyle, medical, and inherited factors rather than a single trigger.
- Smoking, excess body weight, and high blood pressure are established modifiable risk factors for RCC.
- According to the NCI’s genetics review of RCC, about 5% to 8% of cases are linked to an inherited genetic syndrome, such as Von Hippel-Lindau disease; a family history of kidney cancer also raises risk.
- Long-term dialysis and long-term misuse of certain pain medicines are additional recognized risk factors.
- Having one or more risk factors does not mean a person will develop RCC, and addressing modifiable factors can help lower personal risk.
Understanding Renal Cell Carcinoma Causes
The exact cause of renal cell carcinoma (RCC) is not fully understood. Most cases develop from a combination of genetic, medical, and lifestyle factors rather than one single trigger, and that same NCI genetics review estimates inherited gene changes explain only about 5% to 8% of cases overall.
A risk factor is anything that raises the chance of developing a disease. Some risk factors for RCC, such as smoking, can be changed, while others, including genetics, age, and family history, cannot. Having one or more risk factors does not mean a person will develop RCC, and some people with no known risk factors develop it anyway.
Lifestyle and Environmental Risk Factors
Lifestyle and environmental exposures are among the most consistently identified risk factors for RCC, and they are also the factors a person has the most ability to change.
Smoking and Tobacco Use
Smoking is one of the major lifestyle-related risk factors for kidney cancer, alongside excess body weight and high blood pressure. Cigarette smoke contains substances that can damage kidney cells over time. Quitting smoking, or never starting, is one of the changeable steps a person can take to help lower their risk.
Diet, Obesity, and Physical Inactivity
Being overweight or having obesity is also a recognized risk factor for kidney cancer; the exact biological explanation for this link is not fully established. Maintaining a healthy weight through diet and regular physical activity is one of the modifiable factors that may help lower risk.
Genetic and Hereditary Predispositions
Most RCC cases occur without a known inherited cause, but specific hereditary syndromes and a family history of kidney cancer are both established risk factors.
Inherited Syndromes
Several inherited syndromes are linked to RCC, each caused by changes in a specific gene:
- Von Hippel-Lindau (VHL) disease: caused by changes in the VHL gene; associated with clear cell RCC, often affecting both kidneys.
- Birt-Hogg-Dubé (BHD) syndrome: linked to the FLCN gene; associated with several kidney tumor types, including chromophobe and oncocytic tumors.
- Hereditary leiomyomatosis and renal cell cancer (HLRCC): linked to changes in the FH gene, this syndrome is tied to a more aggressive RCC subtype along with benign skin and uterine growths known as leiomyomas.
- Hereditary papillary renal carcinoma (HPRC): linked to changes in the MET gene; associated with papillary-type RCC.
These four are recognized as the major hereditary RCC syndromes. Per that same genetics review, each follows an inheritance pattern in which a parent who carries the altered gene has about a 50% chance of passing it to each child. Genetic counseling is recommended before genetic testing for anyone whose personal or family history suggests one of these syndromes.
Family History of Kidney Cancer
Even without a diagnosed hereditary syndrome, having a first-degree relative, such as a parent, sibling, or child, with kidney cancer is associated with a higher risk, roughly two to two-and-a-half times that of the general population in population-based studies. This suggests that other, not-yet-identified genetic or shared-environment factors may also contribute within some families.
Medical Conditions and Treatments
Certain pre-existing medical conditions and long-term treatments are also linked to a higher chance of developing RCC.
Chronic Kidney Disease and Dialysis
People who require long-term dialysis have an increased risk of developing RCC. Other structural or inherited kidney conditions, including horseshoe kidney (in which the kidneys are fused) and polycystic kidney disease, are also associated with a higher risk.
Hypertension and Certain Medications
High blood pressure is a recognized risk factor for kidney cancer, though it isn’t clear whether the increased risk comes from the high blood pressure itself or from medicines used to treat it. Long-term misuse of certain pain medicines, including some over-the-counter pain relievers, has also been identified as a risk factor. Anyone with high blood pressure should talk with their healthcare provider before changing or stopping a medication, since treating hypertension has other important health benefits.
Steps to Reduce Your Renal Cell Carcinoma Risk
Some renal cell carcinoma risk factors, such as inherited genetics, cannot be changed, but several of the modifiable factors described above can be addressed through everyday choices and regular care.
Healthy Lifestyle Choices
Not smoking, maintaining a healthy weight, and managing blood pressure address several of the modifiable risk factors discussed above. A more detailed, step-by-step prevention and screening guide is covered separately in Massive Bio’s dedicated resource on reducing kidney cancer risk.
Regular Medical Check-ups
People with known risk factors, especially a strong family history or an inherited syndrome, may benefit from discussing personalized screening with a healthcare provider. Regular check-ups can also help monitor related conditions such as high blood pressure and long-term kidney disease.
Frequently Asked Questions
What are the primary causes of renal cell carcinoma?
A single definitive cause of RCC has not been identified; instead, risk reflects a combination of factors such as smoking, excess body weight, elevated blood pressure, long-term dialysis, and inherited conditions like Von Hippel-Lindau disease, with most cases lacking one clear trigger.
Can lifestyle changes significantly reduce kidney cancer risk factors?
Yes. Not smoking, maintaining a healthy weight, and managing blood pressure address several of the modifiable risk factors linked to RCC. These changes cannot eliminate risk entirely, since some risk factors, such as genetics, cannot be changed.
Who is at risk for renal cell carcinoma due to genetic factors?
People with a first-degree relative who has had kidney cancer, and those with an inherited syndrome such as Von Hippel-Lindau disease, Birt-Hogg-Dubé syndrome, or hereditary papillary renal carcinoma, have a higher genetic risk of RCC. Genetic counseling can help assess personal risk in these situations.
