URINARY TISSUE FACTOR LEVELS IN TRANSITIONAL CELL-CARCINOMA OF THE BLADDER

Production of procoagulant activity by host and tumour cells may be increased in patients with cancer. Using a simple chromogenic assay, we have determined urinary tissue factor (TF) levels in patients presenting with transitional cell carcinoma of the bladder (TCC, n = 63), normal controls (n = 20) and patients with benign prostatic hypertrophy (BPH, n = 35). In addition, a separate cohort of patients undergoing endoscopic surveillance for superficial bladder cancer were studied to determine whether there was any difference in levels in those with recurrent disease compared to those with normal cystoscopies. Urinary TF activity was higher in TCC compared to controls (p <0.001) and patients with BPH (p <0.05). In patients undergoing check cystoscopy, those with recurrent disease (n = 32) had higher levels (p <0.01) than those with normal examinations (n = 21). It is concluded that urinary TF levels are elevated in bladder cancer and that this reflects disease activity in those at risk of recurrent superficial disease.