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Table 1 FNCLCC histological grading criteria [34, 35]

From: UK guidelines for the management of soft tissue sarcomas

Tumour differentiation

Necrosis

Mitotic count (n per 10 high power fields)

1. Well

0: Absent

1: n < 10

2. Moderate

1: <50%

2: 10–19

3. Poor (anaplastic)

2: ≥50%

3: n ≥ 20

  1. The sum of the scores of the three criteria determines the grade of malignancy. Grade 1 = 2 or 3; Grade 2 = 4 or 5; Grade 3 = 6