Table 2.

HPV prevalence by oropharyngeal sub-site (data extracted only from studies reporting HPV data separated by tonsils, tongue base, soft palate/uvulae and oropharyngeal walls).

Oropharyngeal sub-sitea	HPV+	HPV-	HPV
	tumours	tumours	prevalence (95% CI)
Tonsilb	1577	1238	56% (54–58%)
Base of tonguec	590	881	40% (38–43%)
Soft palated	59	429	12% (9–15%)
Posterior walle	122	537	19% (16–22%)

^aThis table only presents data from studies that have divided by oropharyngeal sub-sites: base of tongue, tonsil, soft palate and posterior wall. Following studies where included: 11, 14–16, 21, 24, 26, 28, 33, 37, 40–41, 43–45, 47, 50, 53, 55, 57, 60–62, 64–65, 70, 72.

^bIncludes tonsil, tonsil pillar, overlapping tonsil and lateral wall.

^cIncludes base of tongue and anterior wall.

^dIncludes soft palate, uvula, superior wall, upper, and soft palate with overlapping lesion.

^eIncludes Posterior wall, Oropharyngeal NOS, pharyngeal wall and faucial arch.