Kidney tumor
Childhood neoplasms
Ossifying renal tumor

Author: Mandolin Ziadie, M.D. (see Authors page)

Revised: 17 January 2017, last major update December 2011

Copyright: (c) 2003-2017,, Inc.

PubMed Search: ossifying renal tumor [title]

Cite this page: Ossifying renal tumor. website. Accessed November 15th, 2018.
Definition / general
  • Rare
  • Calcified mass in renal pelvis composed of spindle cells in partially calcified osteoid matrix
Clinical features
  • Presents as gross hematuria or abdominal mass; benign behavior
Case reports
Gross description
  • 2 - 3 cm polypoid lesion in renal pelvis / collecting system
Microscopic (histologic) description
  • Osteoid core surrounded by osteoblasts and spindle cells with focal osteoid matrix
Microscopic (histologic) images

Images hosted on PathOut server:

Spindle cells with focal osteoid matrix; osteoid core

Images hosted on other servers:

Ossifying renal tumor

Additional references