WHO / ISIP classification

Author: Sean Williamson, M.D. (see Authors page)

Revised: 14 September 2017, last major update June 2012

Copyright: (c) 2002-2017, PathologyOutlines.com, Inc.

PubMed Search: Papillary urothelial neoplasms [title] NOT carcinoma papilloma

Related topics: Inverted urothelial papilloma , Papillary urothelial neoplasm of low malignant potential
Cite this page: Williamson, S. Papilloma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/ureterspapgeneral.html. Accessed July 21st, 2018.
Definition / general
  • Rare, benign, usually small and isolated in younger patients
  • May recur
Gross description
  • Soft, pink, delicate papillary structures, usually pedunculated
Microscopic (histologic) description
  • Distinct papillary growth
  • Small delicate stalk with central fibrovascular core lined by urothelium of normal thickness and cytology
  • No fusion of adjacent fronds
  • Papillary fronds may appear detached due to sectioning of complex arborizing papillary structures
  • Necrosis rare
  • Minimal mitosis
Microscopic (histologic) images

Images hosted on other servers:

Urothelial papilloma: H&E, CD44, CK20

Additional references