Influence of Socio-Occupational Factors and Chlorinated Solvents on Kidney Cancer Risk

Overview

This multicentric French study of 1252 renal cell carcinoma (RCC) patients identified hypertension, smoking, obesity, and occupational exposure to chlorinated solvents as prevalent risk factors. Farm operators exhibited larger tumors and higher TNM stages, while exposure to chlorinated solvents was associated with more aggressive tumor features and increased risk of clear cell RCC.

Background

Renal cell carcinoma (RCC) is the 14th most common cancer worldwide, with higher incidence in developed regions, men, and African Americans. The incidence of RCC has been rising globally, partly due to increased detection and growing prevalence of risk factors such as obesity, hypertension, chronic kidney disease, and smoking. Occupational exposure to chlorinated solvents, especially trichloroethylene, is a recognized risk factor for RCC and has been officially acknowledged in France since 2021. Identifying high-risk occupational groups and understanding tumor characteristics related to exposures is crucial for prevention and screening.

Data Highlights

Key Findings

• Hypertension was the most common risk factor (49.9%), followed by smoking (27.9%) and obesity (26.7%).
• Occupational exposure to chlorinated solvents was reported in 13.7% of patients and was linked to more aggressive tumor features.
• Farm operators had a tendency toward larger tumors and higher TNM stages compared to other socio-professional categories.
• Clear cell RCC constituted the majority (78%) of cases, with chlorinated solvent exposure associated with increased risk of ccRCC.
• Nearly 88% of patients had at least one RCC risk factor, and 20.4% had three or more risk factors concurrently.

Clinical Implications

Clinicians should consider occupational history, especially exposure to chlorinated solvents, when assessing RCC risk and tumor aggressiveness. High-risk occupational groups such as farm operators may benefit from targeted screening and preventive strategies. Managing modifiable risk factors like hypertension, smoking, and obesity remains essential in RCC risk reduction.

Conclusion

This study highlights the significant influence of socio-occupational factors and chlorinated solvent exposure on RCC risk and tumor characteristics in a French population. Identifying and addressing these factors can improve RCC prevention and management.

References

1. INCa 2023 -- National Cancer Institute France RCC Data
2. IARC -- Global RCC Epidemiology
3. UroCCR Project (NCT03293563) -- Multicentric RCC Database
4. French Social Security Code 2021 -- RCC Occupational Disease Recognition