Table 1 CT and MRI characteristic and univariate analyses of primary parotid SCC and MEC
Characteristic | SCC (n = 31) | MEC (n = 59) | p value | ||
|---|---|---|---|---|---|
No of patients | % | No of patients | % | ||
Location | 0.322 | ||||
Superficial part | 18 | 58.1 | 31 | 52.5 | |
Deep part | 3 | 9.7 | 2 | 3.4 | |
Mixed | 10 | 32.2 | 26 | 44.1 | |
Size (cm)* | 4.12 ± 1.52 | 3.03 ± 1.67 | 0.03 | ||
Shape | 0.02 | ||||
Round/oval | 9 | 29 | 39 | 66.1 | |
Lobulated | 13 | 41.9 | 8 | 13.6 | |
Irregular | 9 | 29 | 12 | 20.3 | |
Margin | 0.384 | ||||
Well-defined | 11 | 35.5 | 27 | 45.8 | |
Ill-defined | 20 | 64.5 | 32 | 54.2 | |
Capsule | 0.533 | ||||
Complete | 1 | 3.2 | 2 | 3.4 | |
Incomplete | 18 | 58.1 | 27 | 45.8 | |
No | 12 | 38.7 | 30 | 50.8 | |
Enhancement pattern | 0.084 | ||||
Homogeneous | 2 | 6.5 | 12 | 20.3 | |
Heterogeneous | 29 | 93.5 | 47 | 79.7 | |
Degree enhancement | 0.027 | ||||
Mild | 1 | 3.2 | 4 | 6.8 | |
Moderate | 14 | 45.2 | 11 | 18.6 | |
Marked | 16 | 51.6 | 44 | 74.6 | |
Gradual enhancement | 0.020 | ||||
Present | 6 | 19.4 | 26 | 44.1 | |
Absent | 25 | 80.6 | 33 | 55.9 | |
Hemorrhage | |||||
Present | 2 | 6.5 | 3 | 5.1 | 0.788 |
Absent | 29 | 93.5 | 56 | 94.9 | |
Necrosis | < 0.001 | ||||
Absence | 4 | 12.9 | 27 | 45.8 | |
Mild | 9 | 29.0 | 23 | 39 | |
Severe | 18 | 58.1 | 9 | 15.3 | |
Cyst | 0.065 | ||||
Present | 23 | 74.2 | 32 | 54.2 | |
Absent | 8 | 25.8 | 27 | 45.8 | |
LTI | 0.005 | ||||
Present | 19 | 61.3 | 18 | 30.5 | |
Absent | 12 | 38.7 | 41 | 69.5 | |
Lymphadenopathy | 0.108 | ||||
Present | 13 | 41.9 | 15 | 25.4 | |
Absent | 18 | 58.1 | 44 | 74.6 | |