Risk factor for bladder carcinoma is -: (A) Clonorcis sinensis, (B) Schistosoma hematobium, (C) Plasmodium, (D) None
Answer is B. Ans. is 'b' i.e., Schistosoma hematobium Risk factors for ca of BladderCigarette smoking is the main etiological factor and accounts for about 50% of bladder cancers.Occupational exposures to chemicalso The following compounds mav be carcinogenic # 2 naphthylamine-combustion gases and soot from coal# 4-aminobiphenyl-chlorinated aliphatic hydrocarbons# 4-nitrobiphenyl-certain aldehydes such as acrolein# 4-4-diaminobiphenyl (benzidine)-aniline dyes# 2-ami- 1-naphthol o Occupation reported to be associated with increased risk of bladder cancer# Autoworkers-metal workers# Painters-textile worker# Truck drivers-dye workers# Drill press operator-petrol workers# Leather workers-rodent exterminators & sevage workersSchistosoma haemotobium - Its a risk factor for both transitional cell ca & squamous cell ca.Drugs such as phenacetin & chlornaphazineCyclophosphamide therapyPelvic irradiationo Vitamin A supplements appear to be protective.