Enneking surgical staging system
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The Enneking surgical staging system (a.k.a. MSTS system) is based on tumour grade, local spread and metastatic disease of malignant musculoskeletal tumours.
It does not classify skull tumours or marrow-originating tumours (e.g. lymphoma, plasmacytoma / multiple myeloma, Ewing sarcoma) 1. It is widely accepted and used by orthopaediac surgeons given its compartment-based classification.
Staging
- stage Ia
- low-grade (G1)
- intracompartmental (T1)
- no metastases (M0)
- stage Ib
- low-grade (G1)
- extracompartmental (T2)
- no metastases (M0)
- stage IIa
- high-grade (G2)
- intracompartmental (T1)
- no metastases (M0)
- stage IIb
- high-grade (G2)
- extracompartmental (T2)
- no metastases (M0)
- stage III
- low or high-grade (G1 or G2)
- intra- or extra-compartmental (T1 or T2)
- distant metastases (M1)
Grading
Low-grade corresponds to Broder grade 1 or 2 (<25% chance metastases) and high-grade corresponds to Broder grade 3 or 4 1.
-<p>The <strong>Enneking surgical staging system</strong> (a.k.a. <strong>MSTS system</strong>) is based on tumour grade, local spread and metastatic disease of malignant <a title="Musculoskeletal tumours by compartment" href="/articles/extraskeletal-musculoskeletal-lesions-by-compartment">musculoskeletal tumours</a>.</p><p>It does not classify skull tumours or marrow-originating tumours (e.g. <a title="lymphoma" href="/articles/lymphoma">lymphoma</a>, <a title="Plasmacytoma" href="/articles/plasmacytoma">plasmacytoma</a> / <a title="Multiple myeloma" href="/articles/multiple-myeloma-1">multiple myeloma</a>, <a title="Ewing sarcoma" href="/articles/ewing-sarcoma">Ewing sarcoma</a>) <sup>1</sup>. It is widely accepted and used by orthopaediac surgeons given its compartment-based classification. </p><h4>Staging</h4><ul>- +<p>The <strong>Enneking surgical staging system</strong> (a.k.a. <strong>MSTS system</strong>) is based on tumour grade, local spread and metastatic disease of malignant <a href="/articles/extraskeletal-musculoskeletal-lesions-by-compartment">musculoskeletal tumours</a>.</p><p>It does not classify skull tumours or marrow-originating tumours (e.g. <a href="/articles/lymphoma">lymphoma</a>, <a href="/articles/plasmacytoma">plasmacytoma</a> / <a href="/articles/multiple-myeloma-1">multiple myeloma</a>, <a href="/articles/ewing-sarcoma">Ewing sarcoma</a>) <sup>1</sup>. It is widely accepted and used by orthopaediac surgeons given its compartment-based classification. </p><h4>Staging</h4><ul>
-<li>intra or extra-compartmental (T1 or T2)</li>- +<li>intra- or extra-compartmental (T1 or T2)</li>
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