Nonurothelial benign tumors

Author: Tom Tong, M.D. (see Authors page)

Revised: 8 June 2016, last major update February 2013

Copyright: (c) 2003-2016,, Inc.

PubMed Search: Bladder [title] hemangioma
Cite this page: Hemangioma. website. Accessed October 21st, 2016.
Definition / General
  • Benign vascular tumor similar to its counterparts elsewhere
  • Predilection for dome, posterior wall and trigone
Clinical Features
  • Generally considered a congenital anomaly, although 50% are detected in adults
  • Associated with cutaneous hemangiomas, Klippel-Trenaunay syndrome (port-wine hemangiomas, varicose veins, soft tissue and bone hemihypertrophy)
  • Painless hematuria, dysuria and abdominal pain
Case Reports
  • Biopsy with or without fulguration; very good outcome
  • Rarely partial cystectomy
Gross Description
  • Sessile
  • Median 0.7 cm
Micro Description
  • Classified as cavernous, capillary, or arteriovenous based on conventional criteria from other sites
  • Usually cavernous type
Micro Images

Images hosted on Pathout server:

Patient with Klippel-Trenaunay syndrome

Images hosted on other servers:

Cavernous hemangiomas

Capillary hemangioma of skin

Differential Diagnosis
  • Angiosarcoma: anastomosing channels lined by plump hyperchromatic cells
  • Arteriovenous malformation: abrupt changes in thickness of medial and elastic layers of vessels, abnormal vascular dilation
  • Telangiectasia: chronically dilated capillaries, no actually increase in number of vessels