Kidney tumor

Childhood tumors

Ossifying renal tumor of infancy

Last author update: 1 December 2011
Last staff update: 23 November 2022 (update in progress)

Copyright: 2003-2022,, Inc.

PubMed Search: ossifying renal tumor [title]

Mandolin S. Ziadie, M.D.
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Cite this page: Ziadie MS. Ossifying renal tumor of infancy. website. Accessed December 9th, 2022.
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

AFIP images

Spindle cells with focal osteoid matrix; osteoid core

Additional references
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