Table 1:

Imaging characteristics of patients with primary tumor among those with HPV+ oropharynx cancer and matched patients with HPV− oropharynx cancer

Imaging Characteristic	HPV+ (n = 61)		HPV− (n = 61)		P Value
Imaging Characteristic	N	%	N	%	P Value
Primary lesion is visible					.362
Yes	47	77.0	51	83.6
No	14	23.0	10	16.4
Primary lesion is enhancing					.182
Yes	37	78.7	34	66.7
No	10	21.3	17	33.3
Primary lesion demonstrates necrosis	8	17.0	7	13.7	.651
Yes	39	83.0	44	86.3
No
Primary lesion demonstrates well-defined border					.067
Yes	35	74.5	29	56.9
No	12	25.5	22	43.1
Primary lesion is exophytic					.095
Yes	14	29.8	8	15.7
No	33	70.2	43	84.3
Primary lesion demonstrates submucosal spread					.667
Yes	26	55.3	26	51.0
No	21	44.7	25	49.0
Primary lesion invades adjacent muscle					.013
Yes	3	6.4	13	25.5
No	44	93.6	38	74.5