[Histopathologic characteristics and clinical behavior of superficial bladder tumors].

The authors analyse the histopathological features and clinical behaviour of 325 superficial (Ta, T1) tumours of 232 patients with bladder cancer. Each of the tumours was treated by TUR using differentiating resection technique and multiple cold biopsy was performed in 197 patients. The recurrence and progression of superficial tumours are examined during the 3-192 months follow up time. It is stressed the role of incomplete TUR in the "recurrence" (tumour persistence). The opinion of the authors is, that superficial bladder tumours can not be considered a homogen group, there are significant differences between Ta and T1 stage in recurrence, neoplastic progression and histopathological features as well.