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Table 1 Patient, tumor, and treatment data for all patients divided by HPV status

From: Prognostic factors for head and neck cancer of unknown primary including the impact of human papilloma virus infection

 

All patients

p16 positive

p16 negative

p-value

Subjects, n (%)

68

41a (69)

18a (31)

 

Age at diagnosis (years)

 Mean (SD)

59.4 (10.9)

57.2 (10.2)

63.4 (11.2)

0.082

 Median (range)

58 (36–87)

56 (36–85)

62 (48–85)

 

Gender, male n (%)

55 (81)

32 (78)

16 (89)

0.55

Histology

 SCC

58 (85)

37 (90)

13 (72)

 

  SCC poorly diff

30 (44)

20 (49)

9 (47)

 

  SCC mod-highly diff

11 (16)

6 (15)

2 (11)

 

  SCC not spec

17 (25)

11 (27)

2 (11)

 

 Carcinoma not spec

10 (15)

4 (10)

5 (28)

0.24

Extracapsular extension

 Yes

11 (16)

7 (23)

4 (44)

 

 No

30 (44)

23 (77)

5 (56)

0.41

N stage

 N1

13 (19)

9 (22)

1 (6)

 

 N2

43 (63)

24 (59)

14 (78)

 

  N2a

24 (35)

14 (34)

10 (56)

 

  N2b

13 (19)

8 (20)

2 (11)

 

  N2c

6 (9)

2 (5)

2 (11)

 

 N3

12 (18)

8 (20)

3 (17)

0.76

Treatment

 Treatment A

36 (53)

28 (68)

8 (44)

 

 Treatment B

25 (37)

10 (24)

6 (33)

 

 Treatment C

7 (10)

3 (7)

4 (22)

0.052

  1. HPV human papilloma virus, SCC squamous cell carcinoma. Treatment A, neck dissection and postoperative (chemo) radiation. Treatment B, (chemo) radiation. Treatment C, neck dissection. aIn nine of 68 patients p16 analysis was not possible