Table 3.
Associations of MRI signs with high-grade sarcoma for the two readers
| Reader 1 | Reader 2 | |||||
|---|---|---|---|---|---|---|
| Value | % High | p | % High | p | κ | |
| Deep layer location | 0 1 |
73.7 64.4 |
0.47 | 73.7 64.4 |
0.47 | 1 |
| Tumour size (>5 cm) | 0 1 |
76.2 62.8 |
0.28 | 77.3 61.9 |
0.21 | 0.90 |
| Lesion heterogeneity in ≥2/3 of total tumour volume on T1 | 0 1 |
64.2 81.8 |
0.26 | 68.8 62.5 |
0.64 | 0.58 |
| Lesion heterogeneity in ≥2/3 of total tumour volume on FS images | 0 1 |
56.8 84.6 |
0.019* | 58.8 76.7 |
0.13 | 0.62 |
| Lesion heterogeneity in ≥2/3 of total tumour volume on T1 FS images | 0 1 |
54.5 79.3 |
0.040* | 56.8 80.8 |
0.047* | 0.35 |
| Tumour enhancement (>51%) on contrast enhanced T1 images | 0 1 |
44.0 81.1 |
0.002* | 44.4 82.9 |
0.002* | 0.67 |
| Tumour haemorrhage | 0 1 |
57.5 83.3 |
0.033* | 58.0 100 |
0.003* | 0.20 |
| Tumour necrosis | 0 1 |
40.0 69.5 |
0.18 | 55.6 69.1 |
0.42 | 0.21 |
| Areas of low signal on T2 | 0 1 |
44.4 83.8 |
0.001* | 38.9 78.3 |
0.003* | 0.30 |
| Present fascia tail sign | 0 1 |
37.0 89.2 |
<0.001* | 55.9 80.0 |
0.04* | 0.23 |
| Absent peritumoural capsule fat sign | 0 1 |
72.2 65.2 |
0.59 | 70.3 63.0 |
0.54 | 0 |
| Diffuse growth pattern | 0 1 |
65.1 71.4 |
0.61 | 68.8 65.6 |
0.79 | 0.41 |
| Blurred tumour margins | 0 1 |
47.6 76.7 |
0.020* | 55.6 71.7 |
0.22 | 0.38 |
| Presence of peritumoural enhancement on contrast enhanced T1 | 0 1 |
45.0 82.5 |
0.003* | 42.1 82.4 |
0.002* | 0.66 |
| Presence of neurovascular invasion | 0 1 |
69.4 60.0 |
0.50 | 65.3 73.3 |
0.56 | 0.48 |
| Lymphadenopathy | 0 1 |
63.8 100 |
0.072 | 64.8 80.0 |
0.35 | 0.01 |