Epidemiology of Bladder Malignancies in the Patients Treated by Trans Urethral Resection in Kurdistan Province in 2012-2017

Background and Aim: Bladder cancer is the ninth most common cancer in the world. Also, it is the fourth most common cancer in men in Iran and the second most common genitourinary cancer after prostate cancer. This study deals with epidemiology of bladder malignancy in the patients treated by transurethral resection in Tohid Hospital in Sanandaj. Materials and Methods: In this cross-sectional study, data were extracted from321 medical records of the patients with bladder malignancy treated by transurethral resection from 2012 to 2017. Data included age, gender, place of residence, occupation, smoking history, histopathology results, disease stage and type of treatment. Frequency and percentage of every variable was calculated. Stata software Ver. 14 was used for data analysis. Results: The results of this study showed that mean ± standard deviation of age of the subjects was 65.6 ± 14 years. 264 (82.2%) patients were men and 247 (76.9%) lived in Sanandaj city. 172 patients (53.6%) had history of smoking and 20 patients (6.2%) had family history of bladder cancer. Histopathology reports of most patients were indicative of transitional cell carcinoma. 210 patients (65.4%) were at stage 1 and 8 patients (2.5%) at stage 4 of the disease. Treatment methods were TURBT in 207 patients (64.5%) and TURBT and BCG into the bladder in 74 patients (23%). Age, gender and disease stage showed no significant statistical association with one another (P>0.05). Conclusion: The incidence of bladder cancer is on the rise, although this increase may be due to improved cancer registration system, as well as use of new diagnostic methods and increased patients' awareness, but change in lifestyle, adverse effects of job on health and other risk factors can lead to increased risk of bladder cancer. Therefore, planning for identification of the causes of this cancer can be helpful in prevention of this cancer.