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Table 1 Characteristics of patients and histological findings

From: Prevalence and association of Epstein-Barr virus infection with sinonasal inverted papilloma and sinonasal squamous cell carcinoma in the northeastern Thai population

CharacteristicsNPSIPSNSCC
Number of cases806482
Age (years)
  < 5047 (58.8%)17 (26.6%)16 (19.5%)
  ≥ 5032 (40.0%)47 (73.4%)66 (80.5%)
No clinical data1 (1.2%)0 (0.0%)0 (0.0%)
Sex (%)
 Male50 (62.5%)45 (70.3%)55 (67.1%)
 Female29 (36.3%)19 (29.7%)27 (32.9%)
 No clinical data1 (1.2%)0 (0.0%)0 (0.0%)
Inflammation (%)
 Sub-acute0 (0.0%)2 (3.1%) 
 Chronic15 (18.8%)2 (3.1%) 
 No inflammation64 (80.0%)52 (81.3%) 
 No clinical data1 (1.2%)8 (12.5%) 
Dysplastic change (%)
 Focal dysplasia 2 (3.1%) 
 Mild dysplasia 2 (3.1%) 
 Severe dysplasia 2 (3.1%) 
 No dysplasia 50 (78.2%) 
 No clinical data 8 (12.5%) 
Cell differentiation (%)
 Undifferentiated  1 (1.2%)
 Poorly differentiated  4 (4.9%)
 Moderately differentiated  12 (14.6%)
 Well differentiated  14 (17.1%)
 No clinical data  51 (62.2%)
Invasion (%)
 Invasive  13 (15.8%)
 Not invasive  65 (79.2%)
 No clinical data  4 (4.9%)
Recurrence (%)
 Yes 3 (4.7%)8 (9.7%)
 No 53 (82.8%)70 (85.4%)
 No clinical data 8 (12.5%)4 (4.9%)
Metastasis (%)
 Yes  1 (1.2%)
 No  77 (93.9%)
 No clinical data  4 (4.9%)