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Bone chapter (nontumor and tumor)
Osteosarcoma - variants
Parosteal osteosarcoma

Reviewer: Nat Pernick, M.D. (see Reviewers page)
Revised: 12 August 2013, last major update June 2005
Copyright: (c) 2003-2013, PathologyOutlines.com, Inc.

General
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Xray description
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Radiology images
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Bone surface mass

Mass behind knee

Femur

Distal femur xray - contributed by Dr. Mark R. Wick

Proximal tibia xray - contributed by Dr. Mark R. Wick

Case reports
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Gross description
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Gross images
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Fleshy fibrous area with hemorrhagic dedifferentiated component

Cross section

Distal femur - contributed by Dr. Mark R. Wick

Contributed by Dr. Mark R. Wick

Micro description
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Micro images
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Bland tumor cells producing trabeculae

Ill-defined island of osteoid

Neoplastic bone

Grade 2

Contributed by Dr. Mark R. Wick

Electron microscopy description
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Differential diagnosis
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End of Bone chapter (nontumor and tumor) > Osteosarcoma - variants > Parosteal osteosarcoma


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