Nonurothelial benign tumors

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

Topic Completed: 1 February 2013

Revised: 20 December 2018

Copyright: (c) 2003-2018,, Inc.

PubMed Search: Bladder [title] hemangioma

Tom Tong, M.D.
Page views in 2018: 1,846
Page views in 2019 to date: 1,269
Cite this page: Tong T Hemangioma. website. Accessed June 18th, 2019.
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
Microscopic (histologic) description
  • Classified as cavernous, capillary, or arteriovenous based on conventional criteria from other sites
  • Usually cavernous type
Microscopic (histologic) 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
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