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Table 1 Risks of high-grade malignancy according to tumor size and T classification in malignant parotid gland tumors

From: Clinical outcomes of bulky parotid gland cancers: need for self-examination and screening program for early diagnosis of parotid 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