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Procedure

Core needle biopsy Curettage Excisional biopsy Intralesional resection Marginal resection Segmental/wide resection Radical resection Other biopsy resection

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Multiple sites of involvement tooltip

Not applicable Multifocal tumor / discontinuous tumor at primary bone site Additional primary bone site(s) present

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Tumor Site

Appendicular skeleton, specify Spine, specify Pelvis, specify Not specified

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Tumor Location and Extent

Epiphysis or apophysis Metaphysis Diaphysis Cortical Medullary cavity Surface Tumor involves joint Tumor extension into soft tissue Cannot be determined

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Histologic Type

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Histologic Grade

G1: Well differentiated, low grade G2: Moderately differentiated, high grade G3: Poorly differentiated, high grade GX: Cannot be assessed Not applicable

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+Mitotic Rate

Specify: /10 high-power fields

note: 1 HPF = 400x field (10x ocular and 40x objective)

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Necrosis

Not Identified Present

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+ Lymphovascular Invasion

Not identified Present Cannot be determined

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Treatment Effect

No known presurgical therapy Not identified Present Cannot be determined

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Preresection Treatment

No known preresection therapy Chemotherapy performed Radiation therapy performed Therapy performed, type not specified Not specified

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+Ancillary Studies