Keck School of Medicine of USC Nov 19 2025 People with type 1 diabetes (previously called juvenile diabetes) are 4.29 times more likely to develop bladder cancer, according to a systematic review and meta-analysis by researchers at the Keck School of Medicine of USC. The new analysis is the first to control for the effects of tobacco smoking, a factor that likely obscured the heightened risk in earlier studies. The results were just published in the journal  Diabetes Research and Clinical