Kidney tumor
Other adult malignancies
Sarcoma of kidney

Author: Sean R. Williamson, M.D.

Revised: 19 April 2018, last major update July 2012

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

PubMed Search: "renal sarcoma" kidney

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Cite this page: Williamson, S.R. Sarcoma of kidney. website. Accessed January 22nd, 2019.
Definition / general
Case reports
Gross description
  • Clear cell sarcoma commonly arises from medullar (Acta Radiol 2011;52:448)
  • Leiomyosarcoma commonly arises from capsule with "buckling" of cortex
  • Osteosarcoma may have dense ossification, though many are indistinguishable from RCC by imaging (Radiographics 2010;30:1525)
  • Solitary fibrous tumor commonly arises from renal sinus
Microscopic (histologic) images

Images hosted on PathOut server:

Many multinucleated giant cells

Osteosarcoma: abundant osteoid is produced

Images hosted on other servers:

Pleomorphic storiform pattern

Fig 1: CT scan shows large solid mass with central, nonenhancing area;
Fig 2: large, well circumscribed, yellow, fleshy tumor with hemorrhage and necrosis;
Fig 3: short fascicles in cartwheel pattern of plump spindle cells;
Fig 4: hemangiopericytoma-like vessels