Kidney tumor
Benign (usually) adult tumors

Author: Mandolin Ziadie, M.D.

Revised: 19 April 2018, last major update January 2012

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

PubMed Search: Hemangioma kidney [title]

Cite this page: Ziadie, M.S. Hemangioma. website. Accessed November 15th, 2018.
Definition / general
  • Benign vascular lesion similar to that seen in soft tissue
  • May be capillary, cavernous or mixed
  • May clinically / radiologically resemble cystic renal cell carcinoma (Int J Clin Oncol 2008;13:166)
  • Usually asymptomatic but may cause recurrent hemorrhage / hematuria
  • May be associated with vascular malformation syndromes including Klippel-Trenaunay and Sturge-Weber
Case reports
Gross description
  • Small (may be difficult to find) reddish blue tumor in medulla / cortex / capsule
  • Usually at tips of papillae; 10% are multiple
Microscopic (histologic) description
  • Proliferation of small or large anastamosing vessels with benign endothelium
  • Mitoses may be present but are not atypical
  • Cavernous type is most common
Microscopic (histologic) images

Images hosted on PathOut server:

Renal hemangioma

Images hosted on other servers:

Mixed capillary cavernous hemangioma

Cavernous hemangioma of bladder