A 66-year-old man presents with a 2-month history of urinary frequency, haematuria and weight loss.
A 66-year-old man presents with a 2-month history of urinary frequency, haematuria and weight loss. He is native to Cameroon and lived there until he moved to England at the age of 45. Cystoscopy reveals a tumour of the bladder.
Which is the most likely cause of his bladder cancer?
Select the SINGLE most appropriate option from the list below. Select ONE option only.
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