Kidney tumor - cysts, children, adult benign - Ossifying renal tumor of infancy

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Kidney tumor - cysts, children, adult benign

Childhood neoplasms

Ossifying renal tumor of infancy

Reviewers: Mandolin Ziadie, M.D. (see Reviewers page)
Revised: 2 January 2012, last major update December 2011
Copyright: (c) 2003-2012, PathologyOutlines.com, Inc.

General
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● Rare
● Calcified mass in renal pelvis composed of spindle cells in partially calcified osteoid matrix

Clinical features
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● Presents as gross hematuria or abdominal mass; benign behavior

Case reports
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● 8 week and 2 year old children (J Pediatr Urol 2007;3:258)

Gross description
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● 2-3 cm polypoid lesion in renal pelvis / collecting system

Micro description
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● Osteoid core surrounded by osteoblasts and spindle cells with focal osteoid matrix

Micro images
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Spindle cells with focal osteoid matrix; osteoid core

Additional references
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● Pediatr Pathol Lab Med 1995;15:745

End of Kidney tumor - cysts, children, adult benign > Childhood neoplasms > Ossifying renal tumor of infancy

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