Résumé
This is a descriptive study designed to evaluate Proliferating cell nuclear antigen [PCNA] in transitional cell carcinoma. A total of fifty per urethra resected bladder tumour samples [TUR BT] were collected from Mayo Hospital and Services Hospital, Lahore and processed for H and E and PCNA stain. The grading of tumours were made on H and E stain. While Proliferating cell nuclear antigen labeling index was recorded for each case. The mean PCNA labeling index was significantly higher in grade III when compared with tumours of grade II. [p < 0.001] carcinoma. Similarly mean PCNA labeling index was significantly higher [p < 0.05] in patients having duration of symptoms up to 3 month when compared with the patients having longer duration of symptoms. The mean PCNA labeling index had significantly higher value in high grade tumours as compared to low grade tumours [p < 0.001]. Although determination of PCNA labeling index is costly yet it has significant role in tumour grading