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WHO Classification of Tumours
Papillary urothelial neoplasm of low malignant potential
Urinary system: Renal pelvis, ureter, bladder, urethra


Definition

Papillary urothelial neoplasm of low malignant potential (PUNLMP)is a non-invasive tumour of the urinary bladder in which the transitional cells form papillae, resembling exophytic urothelial papilloma. The papillary structures exhibit minimal architectural distortion and atypia but show a higher rate of proliferation and an increased thickness when compared to the normal urothelium
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Eble JE, Sauter G, Epstein JI, Sesterhenn IA (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of the Urinary System and Male Genital Organs.
3rd Edition
IARC Press: Lyon 2004



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