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AJCC TNM staging system for soft tissue sarcoma.
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Histologic grading is defined as follows: (1) Differentiation: score from 1 to 3, (2) Mitotic count: score from 1 to 3, and (3) Tumor necrosis: score from 0 to 2.
Sum (1) to (3) and determine grade as follows.
Gx: not assessed.
G1: total score of 2 or 3.
G2: total score of 4 or 5.
G3: total score of >5.
