Table 2 Conventional MR imaging features of RMS
MR imaging features | RMS | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
ERMS | ARMS | Mixed | Overall | P | k | |||||
N | % | N | % | N | % | N | % | |||
No. of patients | 14 | 51.9 | 7 | 25.9 | 6 | 22.2 | 27 | 100 | ||
Location | 0.583 | 1.000 | ||||||||
Ethmoid sinus and/or nasal cavity | 12 | 85.7 | 7 | 100 | 4 | 66.6 | 23 | 85.2 | ||
Maxillary sinus | 1 | 7.15 | 0 | 0 | 1 | 16.7 | 2 | 7.4 | ||
Ethmoid and maxillary sinus | 1 | 7.15 | 0 | 0 | 1 | 16.7 | 2 | 7.4 | ||
Tumor extent | 0.842 | 0.697 | ||||||||
< 3 cavities | 3 | 21.4 | 2 | 28.6 | 2 | 33.3 | 7 | 25.9 | ||
≥ 3 cavities | 11 | 78.6 | 5 | 71.4 | 4 | 66.7 | 20 | 74.1 | ||
Margin | 0.617 | 0.649 | ||||||||
Well-defined | 1 | 7.1 | 0 | 0 | 0 | 0 | 1 | 3.7 | ||
Ill-defined | 13 | 92.9 | 7 | 100 | 6 | 100 | 26 | 96.3 | ||
Shape | 0.617 | 1.000 | ||||||||
Regular | 1 | 7.1 | 0 | 0 | 0 | 0 | 1 | 3.7 | ||
Irregular | 13 | 92.9 | 7 | 100 | 6 | 100 | 26 | 96.3 | ||
Signal intensity on T1-weighted image | 0.06 | 0.714 | ||||||||
Hypointense | 2 | 14.3 | 2 | 28.6 | 0 | 0 | 4 | 14.8 | ||
Isointense | 12 | 85.7 | 5 | 71.4 | 4 | 66.7 | 21 | 77.8 | ||
Hyperintense | 0 | 0 | 0 | 0 | 2 | 33.3 | 2 | 7.4 | ||
Signal intensity on fat-suppressed T2-weighted image | 0.585 | 0.727 | ||||||||
Hypointense | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
Isointense | 5 | 35.7 | 3 | 42.9 | 1 | 16.7 | 9 | 33.3 | ||
Hyperintense | 9 | 64.3 | 4 | 57.1 | 5 | 83.3 | 18 | 66.7 | ||
Homogeneity on T1-weighted image | 0.72 | 0.707 | ||||||||
Homogeneous | 9 | 64.3 | 5 | 71.4 | 3 | 50 | 17 | 63 | ||
Heterogeneous | 5 | 35.7 | 2 | 28.6 | 3 | 50 | 10 | 37 | ||
Homogeneity on fat-suppressed T2-weighted image | 0.617 | 0.78 | ||||||||
Homogeneous | 1 | 7.1 | 1 | 14.3 | 0 | 0 | 2 | 7.4 | ||
Heterogeneous | 13 | 92.9 | 6 | 85.7 | 6 | 100 | 25 | 92.6 | ||
Homogeneity on fat-suppressed contrast-enhanced T1-weighted image | 0.617 | 0.649 | ||||||||
Homogeneous | 1 | 7.1 | 0 | 0 | 0 | 0 | 1 | 3.7 | ||
Heterogeneous | 13 | 92.9 | 7 | 100 | 6 | 100 | 26 | 96.3 | ||
Degree of enhancement | 0.092 | 0.75 | ||||||||
Mild | 1 | 7.1 | 0 | 0 | 2 | 33.3 | 3 | 11.1 | ||
Moderate | 5 | 35.7 | 3 | 42.9 | 4 | 66.7 | 12 | 44.45 | ||
Marked | 8 | 57.2 | 4 | 57.1 | 0 | 0 | 12 | 44.45 | ||
Botryoid enhancement | 0.044 | 0.773 | ||||||||
Present | 11 | 78.6 | 2 | 28.6 | 2 | 33.3 | 15 | 55.6 | ||
Absent | 3 | 21.4 | 5 | 71.4 | 4 | 66.7 | 12 | 44.4 | ||
Mucosal invasion of maxillary sinus | 0.383 | 0.851 | ||||||||
Present | 9 | 64.3 | 3 | 42.9 | 2 | 33.3 | 14 | 51.9 | ||
Absent | 5 | 35.7 | 4 | 57.1 | 4 | 66.7 | 13 | 48.1 | ||
Skull involvement | 0.044 | 0.777 | ||||||||
Present | 8 | 57.1 | 6 | 85.7 | 1 | 16.7 | 15 | 55.6 | ||
Absent | 6 | 42.9 | 1 | 14.3 | 5 | 83.3 | 12 | 44.4 | ||
Orbit involvement | 0.073 | 0.71 | ||||||||
Present | 13 | 92.9 | 6 | 85.7 | 3 | 50 | 22 | 81.5 | ||
Absent | 1 | 7.1 | 1 | 14.3 | 3 | 50 | 5 | 18.5 | ||
Lymph node metastases | 0.062 | 1.000 | ||||||||
Present | 12 | 85.7 | 4 | 57.1 | 2 | 33.3 | 18 | 66.7 | ||
Absent | 2 | 14.3 | 3 | 42.9 | 4 | 66.7 | 9 | 33.3 | ||