de Saint Aubain Somerhausen and Fletcher44 |
MI | 0–2/30HPF | 3–4/30HPF | >4/30HPF |
| (spindle cell lesion, no atypia) | (spindle cell lesion, no atypia) | (spindle cell lesion, no atypia) |
| | 2–3/30HPF | >2/30HPF |
| | (spindle cell lesion, mild atypia) | (spindle cell lesion, frank atypia) |
| 0/30HPF | 1/30HPF | >1/30HPF |
| (epithelioid lesion) | (epithelioid lesion) | (epithelioid lesion) |
Miettinen and colleagues2 |
MI | 0–1/10HPF | 2–5/10HPF | >5/10HPF |
| (gastric lesion) | (gastric lesion) | (gastric lesion) |
| Criteria concerning mitotic activity for tumours at other sites is less informative |
Size | <5 cm | 5–10 cm | >10 cm |
| (gastric lesion) | (gastric lesion) | (gastric lesion) |
| | Criteria for size is less well established |
Kindblom and colleagues18 |
MI | 0/10HPF | | 1 or more/10HPF |
xOther | Bland cytology | Some but not all of the features of malignancy | Frank cellular/nuclear atypia |
| No necrosis | | Necrosis |
| No mucosal infiltration | | Mucosal infiltration |
| | | Haemorrhage |