According to the Enneking classification of surgical margins, removal of the tumour en bloc together with the entire anatomical compartment in which it lies constitutes which type of margin?

• A Intralesional margin
• B Marginal margin
• C Wide margin
• D Radical margin ✓

Explanation

Four margin types are defined. Intralesional means cutting through the tumour itself, as in curettage. Marginal means shelling out the tumour along its pseudocapsule or reactive zone, leaving microscopic satellite deposits behind. Wide means removing the tumour with a cuff of normal tissue but staying within the same compartment. Radical means removing the entire compartment, for example the whole quadriceps group, and is reserved for high-grade tumours when compartmental anatomy permits.

Reference: Campbell's Operative Orthopaedics, 14th ed.

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