Age distribution types of bladder cancers and their relationship with opium consumption and smoking.

Background: Recognition of the predisposing factors of bladder cancer is very important and provides possible prevention measures. The aim of this study was to investigate the types, distribution of bladder tumors and their relationship with opium consumption and smoking in patients who referred to Shahid Beheshti Hospital, Babol, Iran.

Methods: In this case-control study, all patients diagnosed with bladder cancer who underwent surgery during 2001-2012 were enrolled.