Table 4 Vascular distributions and grade of three types of parotid gland tumors by SMI
From: The diagnostic value of Superb Microvascular Imaging in identifying benign tumors of parotid gland
Pathological type | n | Vascular Distributions | Vascular Grade | VI | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Avascular | Peripheral | Central | Mixed | Grade 0 | Grade 1 | Grade 2 | Grade 3 | |||
PA | 148 | 38 (25.7%) | 49 (33.1%) | 29 (19.6%) | 32 (21.6%) | 38 (25.7%) | 41 (27.8%) | 37 (22.9%) | 32 (21.6%) | 4.57 ± 2.40 |
BCA | 18 | 2 (11.1%) | 6 (33.3%) | 4 (22.3%) | 6 (33.3%) | 2 (11.1%) | 4 (22.3%) | 6 (33.3%) | 6 (33.3%) | 6.89 ± 3.47 |
WT | 83 | 8 (9.6%) | 20 (24.1%) | 26 (31.3%) | 29 (34.9%) | 7 (9.6%) | 15 (16.9%) | 29 (36.2%) | 32 (37.3%) | 8.89 ± 3.87 |
□χ2 | 16.175 | 20.413 | 44.012 | |||||||
P value | 0.013 | 0.002 | <0.001 | |||||||