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Distribution of HPV infection by single or multiple subtypes in benign and malignant parotid gland tumor tissues.
| Group | n | Single subtype infection, n (%) | Mixed infection, high- and low-risk subtypes, n (%) | Mixed infection, high-risk subtypes, only, n (%) | Mixed infection, low-risk subtypes only, n |
|---|---|---|---|---|---|
| Benign tumor | 31 | 16 (51.6) | 6 (19.4) | 9 (29.0) | 0 |
| Malignant tumor | 3 | 0 (0.0) | 1 (33.3) | 2 (66.7) | 0 |
| Total | 34 | 16 (47.1) | 7 (20.6) | 11 (32.3) | 0 |
HPV, human papillomavirus.
