![]() ![]() ![]() Kappa statistics were used to evaluate interobserver variability. The tumour categories for WHO classification 1972 papilloma, and transitional cell carcinoma (TCC) grades I, II and III were compared with the WHO/ISUP Consensus Classification entities of papilloma, papillary neoplasm of low malignant potential, low grade and high grade papillary carcinomas. ![]() These were classified according to WHO Classification 1972 and WHO/ISUP Consensus Classification 1998 by 2 groups of pathologists independently. This study included 100 consecutive biopsy specimens of urothelial neoplasms of the urinary bladder diagnosed at the department of Histopathology, Armed Forces Institute of Pathology, Rawalpindi. The objective of this study was to classify urothelial neoplasms of the urinary bladder using the latest WHO/ISUP Consensus Classification 1998 and WHO Classification 1972 and compare the two regarding interobserver variability. Over the years many classifications have been proposed for this purpose. Classification of urothelial bladder tumours is an important factor in the treatment and prognosis of these lesions. ![]()
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February 2023
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