title: [Nine cases of bladder cancer occurring in occupational dye users].
abstract: Workers in the dye manufacturing industry have a high risk of urinary bladder cancer. There may also be a high relative risk of bladder cancer in occupational dye users. Nine occupational dye users were found to have bladder cancer. The period of engaging with dye work ranged from 5 to 40 years. Seven patients had bladder cancer and the other 2 patients had lesions both in the bladder and in the renal pelvis. Histopathology of all cases was transitional cell carcinoma. Three cases were classified into grade 1 and 6 cases into grade 2. One patient died of bladder cancer. The other 8 patients are alive. Four cases recurred after TUR therapy. It is necessary to establish systemic mass screening examination of occupational dye users for the early diagnosis of bladder cancer.
mesh_terms: D000368:Aged; D002295:Carcinoma, Transitional Cell / Q000139:chemically induced* / Q000453:epidemiology; D004396:Coloring Agents; D006801:Humans; D007564:Japan; D008875:Middle Aged; D009784:Occupational Diseases / Q000139:chemically induced* / Q000453:epidemiology; D011379:Prognosis; D001749:Urinary Bladder Neoplasms / Q000139:chemically induced* / Q000453:epidemiology
chemical_list: D004396:Coloring Agents