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Table 1 Patient characteristics

From: PD-L1 expression in malignant salivary gland tumors

Characteristic Total (n = 47) No. of patients %
Gender
 Male 26 55.3
 Female 21 44.7
Stage
 I 9 19.1
 II 18 38.3
 III 5 10.6
 IV 15 31.9
Histology
 adenoid cystic carcinoma 25 40.4
 mucoepidermoid carcinoma 9 17.0
 adenocarcinoma 11 23.4
 mucinous adenocarcinoma 2 6.4
Recurrence or metastasis after surgery
 No 31 66.0
 Yes 16 34.0
PD-L1 expression in tumor cells membrane
  < 5% (negative) 23 48.9
  ≥ 5% (positive) 24 51.1
PD-L1 expression in tumor-infiltrating mononuclear cells (TIMC)
 Score < 4 (negative) 27 57.4
 Score ≥ 4 (positive) 20 42.6
  Median Min-max
Age (years) 62.0 24–80
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