Table 1 Risks of high-grade malignancy according to tumor size and T classification in malignant parotid gland tumors
Tumor size (greatest dimension) | Total (No.) (N = 406) | High-grade malignancy (No.,%) (N = 128) | P |
|---|---|---|---|
< 2 cm | 109 | 22 (20.2) | 0.0004 |
2–4 cm | 189 | 65 (34.4) | |
≥ 4 cm | 73 | 35 (47.9) | |
Unknown | 33 | 6 | |
T classification | |||
T1 | 96 | 15 (15.6) | < 0.0001 |
T2 | 132 | 41 (31.1) | |
T3 | 61 | 17 (27.9) | |
T4 | 93 | 55 (59.1) | |
Unknown | 24 | ||