Home   Chapter Home   Jobs   Conferences   Fellowships   Books


Kidney tumor - adult malignancies

Other neoplasms – adult or adult/child

Sarcoma of kidney

Reviewers: Sean Williamson, M.D. (see Reviewers page)
Revised: 5 July 2012, last major update July 2012
Copyright: (c) 2003-2012, PathologyOutlines.com, Inc.


● See also anaplastic sarcoma, angiosarcoma, clear cell sarcoma (childhood), clear cell sarcoma of soft parts, Ewing's sarcoma/PNET, leiomyosarcoma, sarcomatoid renal cell carcinoma, synovial sarcoma
● Sarcomatoid carcinomas or extension of retroperitoneal sarcomas are much more common than primary renal sarcoma, and should be ruled out by search for an epithelial component and correlation with clinical history

Case reports

● Liposarcoma (Am J Surg Pathol 1990;14:268)
● Malignant fibrous histiocytoma (71 year old man, Arch Pathol Lab Med 2000;124:913)
● Osteosarcoma (Arch Pathol Lab Med 1991;115:1262)

Gross/imaging 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

Micro images

Malignant fibrous histiocytoma:
Pleomorphic-storiform pattern of malignant spindle cells

Many multinucleated giant cells

Figure 1: CT scan shows large solid mass with central, non-enhancing 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


Abundant osteoid is produced

End of Kidney tumor - adult malignancies > Adult renal cell carcinoma > Sarcoma of kidney

This information is intended for physicians and related personnel, who understand that medical information is often imperfect, and must be interpreted in the context of a patient's clinical data using reasonable medical judgment. This website should not be used as a substitute for the advice of a licensed physician.

All information on this website is protected by copyright of PathologyOutlines.com, Inc. Information from third parties may also be protected by copyright. Please contact us at [email protected] with any questions (click here for other contact information).