Table 4 Histological scoring.

From: Histological markers, sickle-shaped blood vessels, myxoid area, and infiltrating growth pattern help stratify the prognosis of patients with myxofibrosarcoma/undifferentiated sarcoma

Myxofibrosarcoma grade (Histological parameter)

Myxoid area

 Score 0

 < 5% myxoid area

 Score 2

5–49% myxoid area

 Score 3

≧ 50% myxoid area

INF

 Score 0

INFa

 Score 1

INFb or INFc

Cellularity

 Score 0

High cell content

 Score 1

Low to medium cell content

Mitotic count

 Score 0

 > 19 mitoses per 10 HPF

 Score 1

0–19 mitoses per 10 HPF

Myxoid area + INF + Cellularity + Mitotic count Score

 So-called myxofibrosarcoma

Score 5, 6

 So-called US

Score 0–4

  1. High cell content: ≧ 50%.
  2. Low to medium cell content: < 50%.
  3. HPF high-power field; 1 HPF = 0.2374 mm2.
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