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. 2021 Jul 1;480(1):33–43. doi: 10.1007/s00428-021-03141-2

Table 1.

Score thresholds for mitotic counts

Field Field Mitotic count (score)
Diameter (mm) Area (mm2) 1 2 3
0.40 0.126  ≤ 4 5–9  ≥ 10
0.41 0.123  ≤ 4 5–9  ≥ 10
0.42 0.138  ≤ 5 6–10  ≥ 11
0.43 0.145  ≤ 5 6–10  ≥ 11
0.44 0.152  ≤ 5 6–11  ≥ 12
0.45 0.159  ≤ 5 6–11  ≥ 12
0.46 0.166  ≤ 6 7–12  ≥ 13
0.47 0.173  ≤ 6 7–12  ≥ 13
0.48 0.181  ≤ 6 7–13  ≥ 14
0.49 0.188  ≤ 6 7–13  ≥ 14
0.50 0.196  ≤ 7 8–14  ≥ 15
0.51 0.204  ≤ 7 8–14  ≥ 15
0.52 0.212  ≤ 7 8–15  ≥ 16
0.53 0.221  ≤ 8 9–16  ≥ 17
0.54 0.229  ≤ 8 9–16  ≥ 17
0.55 0.237  ≤ 8 9–17  ≥ 18
0.56 0.246  ≤ 8 9–17  ≥ 18
0.57 0.255  ≤ 9 10–18  ≥ 19
0.58 0.264  ≤ 9 10–19  ≥ 20
0.59 0.273  ≤ 9 10–19  ≥ 20
0.60 0.283  ≤ 10 11–20  ≥ 21
0.61 0.292  ≤ 10 11–21  ≥ 22
0.62 0.302  ≤ 11 12–22  ≥ 23
0.63 0.312  ≤ 11 12–22  ≥ 23
0.64 0.322  ≤ 11 12–23  ≥ 24
0.65 0.332  ≤ 12 13–24  ≥ 25
0.66 0.342  ≤ 12 13–24  ≥ 25
0.67 0.352  ≤ 12 13–25  ≥ 26
0.68 0.363  ≤ 13 14–26  ≥ 27
0.69 0.374  ≤ 13 14–27  ≥ 28