Relationship of blood groups and transitional cell carcinoma of the bladder.

Blood groups of 50 patients with transitional cell carcinoma of the bladder, who were followed up for a minimum of 3 years, were analyzed. The blood group distribution of the patients reflected that of the general population. There was no relationship between blood groups and stage and grade of the tumour at initial presentation. However, patients with blood group O had worse prognosis than the others.