<prompt> Carcinoma common in dye industry workers:SkinScrotumUrinary bladderMaxilla  <response>: Ans. c Urinary bladder. Ref. Bailey and Love, 25thpg.1334RISK FACTORS FOR CARCINOMA OF BLADDER Following occupations have been reported to be associated with a significantly increased risk of carcinoma bladder:- Cigarette smoking- Dye workers, Textile workers, Petrol workers, Leather workers, Tyre tube and cable workers, Painter, Shoe manufacturers and cleaners. Following compounds are carcinogenic, as far as urinary bladder carcinoma is considered:- 2-naphthylamine, 4-aminobiphenyl benzidine, Chloro-o-toludine, O-toludine, 4--4-methylene bis 2-chloroaniline, Methyleneclianiline Other risk factors:- Genetic: Polymorphisms for N-acetyl transferase, glutathione transferase cytochrome P450 CYP2D6- Schistosomiasis Squamous cell carcinoma0- Balkan nephropathy- In activation of tumor suppressor genes like p53, pl6Rb and activation of tumor oncogenes like ras c-erb. B- 2. 