Kidney tumor
Benign (usually) adult tumors

Author: Mandolin Ziadie, M.D.

Revised: 18 April 2018, last major update February 2012

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

PubMed Search: Myelolipoma kidney

Page views in 2018: 605
Page views in 2019 to date: 35
Cite this page: Ziadie, M.S. Myelolipoma. website. Accessed January 23rd, 2019.
Definition / general
  • Adipose and hematopoietic tumor usually diagnosed in adrenal gland
  • Rare
  • < 50 cases outside of adrenal gland with < 25 cases in kidney
  • May coexist with other tumors: papillary urothelial carcinoma (Int J Surg Pathol 2010;18:437)
Clinical features
  • Benign
Case reports
Gross images

Images hosted on other servers:

Well delineated lesion (arrow) infiltrating into hilum

73 year old man with pelvic
tumor - Contributed by Mark
W. Rodacker, M.D., Ph.D.

Microscopic (histologic) description
  • Mixture of adipose tissue and normal hematopoietic cells
  • No bony spicules
  • Not connected to medullary cavity of any bone by definition
Microscopic (histologic) images

Images hosted on other servers:

Fat cells and hematopoietic cells

Various images

Myelolipoma separated
from renal parenchyma
by fibrous band (arrow)