"Prediagnosis BMI and risk of all-combined, colorectal, liver, lymphoma, biliary tract, kidney, and obesity-related secondary primary cancers had positive linear trends."

Obesity Raises Risk for Secondary Primary Cancers in Men

"The researchers found that over 1,614,583 person-years of follow-up, 4799 patients had secondary primary cancers. Among cancer survivors, the age-standardized incidence rate of cancer was 1.1 times higher than that of the general population. Prediagnosis BMI and risk of all-combined, colorectal, liver, lymphoma, biliary tract, kidney, and obesity-related secondary primary cancers had positive linear trends. The adjusted hazard ratios for secondary primary cancers among severely obese (BMI ≥ 30 kg/m²) cancer survivors were significantly higher than those for first cancers among all cohort participants (1.41 vs 1.12)."