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Clinical calculator summary

Enneking Staging (Bone/Sarcoma)

The Enneking Staging System (MSTS) is widely used for the surgical staging of bone and soft tissue sarcomas.

Evidence-based context for fast calculator use

Purpose:
Enneking Staging classifies musculoskeletal sarcomas by grade, compartment, and metastasis to determine surgical resection margins.
Population:
patients with the bone or soft-tissue sarcoma subtype and pathology/staging context described by the model
Factors:
Surgical Grade, Local Extent, Metastasis
Reference:
Enneking WF, Spanier SS, Goodman MA. A system for the surgical staging of musculoskeletal sarcoma. Clin Orthop Relat Res. 1980;(153):106-120.
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Enneking Staging (Bone/Sarcoma)

Clinical Context & Background

The Enneking Staging System (MSTS) is widely used for the surgical staging of bone and soft tissue sarcomas. It relies on Grade (G), Local Extent (T), and Metastasis (M) to determine the stage, which in turn dictates the surgical margin required (e.g., Intralesional, Marginal, Wide, Radical).
Primary Source EvidenceEnneking WF, Spanier SS, Goodman MA. A system for the surgical staging of musculoskeletal sarcoma. Clin Orthop Relat Res. 1980;(153):106-120.
Formula Logic
Stage based on Grade (Low/High), Site (Intra/Extracompartmental), and Mets.

Reference Data

StageDefinitionSurgical Margin Goal
IALow Grade, IntracompartmentalWide Excision
IBLow Grade, ExtracompartmentalWide Excision
IIAHigh Grade, IntracompartmentalWide / Radical Resection
IIBHigh Grade, ExtracompartmentalRadical Resection
IIIAny Grade with MetastasisPalliative / Resection of Mets

Clinical Workflow

Use, Interpret, And Continue The Patient Pathway

Expand for workflow guidance, limitations, examples, and related next steps.

When To Use

  • Use Enneking Staging (Bone/Sarcoma) when enneking Staging classifies musculoskeletal sarcomas by grade, compartment, and metastasis to determine surgical resection margins.
  • Confirm that the patient, diagnosis, disease phase, and available inputs match the cited model before calculation.

How To Interpret

  • Interpret the displayed result using the calculator-specific formula and reference table, spanning IA through III.
  • A boundary result should prompt input verification and clinical review rather than false precision.

What To Do Next

  • Confirm expert pathology, anatomic site, size, depth, grade, margins, imaging, and metastatic staging in a sarcoma multidisciplinary team.
  • Document the inputs, result, timing, and clinical context so the assessment can be reproduced.

Limitations

  • Histologic grade and anatomic stage are distinct, and some sarcoma subtypes require subtype-specific systems.
  • The result supports clinician judgment and does not independently determine treatment.

Validated Population

patients with the bone or soft-tissue sarcoma subtype and pathology/staging context described by the model

How to apply this result

For a representative case, verify Surgical Grade, Local Extent, Metastasis, calculate the result, and confirm that its classification matches the highlighted reference band before continuing the disease-specific pathway.

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Frequently Asked Questions

When should Enneking Staging (Bone/Sarcoma) be used?

Use it for patients with the bone or soft-tissue sarcoma subtype and pathology/staging context described by the model when all required inputs and the intended clinical setting are confirmed.

Can Enneking Staging (Bone/Sarcoma) determine treatment by itself?

No. Interpret the result with the cited evidence, complete clinical assessment, current guidelines, and patient-specific goals.

Evidence-based oncology decision support. Verify with clinical guidelines.