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WHO Classification of Tumours
Transitional cell carcinoma
Prostate gland


Definition

A malignant neoplasm arising from the transitional cell epithelium lining the renal pelvis, ureter, bladder and urethra. It may or may not have a papillary configuration. It is graded 1 to 3 or 4 according to the degree of cellular differentiation and architectural patterns. Grade 1 urothelial carcinoma is histologically benign but it may recur.