[Polyarthritis as a rare complication in BCG immunoprophylaxis of urinary bladder cancer].

Vaccine BCG instillations as immunoprophylaxis of superficial cancer of the urinary bladder (UB) are likely to entail side effects and serious complications. A rare case is reported of hypersensitivity reaction to M. tuberculosis with involvement of the joints. Polyarthritis was controlled with antituberculous treatment in combination with steroid hormones.