Association of p16 as Prognostic Factors for Oropharyngeal Cancer: Evaluation of p16 in 1470 Patients for a 16 Year Study in Northeast China

Table 2

Histological diagnosis of patients.

Histological diagnosis		%
Squamous cell carcinoma
SCC NOS/conventional nonkeratinizing	174	11.84
Conventional keratinizing	1271	86.46
Conventional exophytic keratinizing	14	0.95
Basaloid/papillary	2	0.14
Verrucous	1	0.07
Sarcomatoid	4	0.27
Undifferentiated carcinoma	2	0.14
Adenosquamous carcinoma	2	0.14
Differentiation
Well	467	31.77
Moderate	818	55.65
Poor	185	12.59
Lymphovascular invasion	615	41.83
Perineural invasion	441	30
Extracapsular spread	244	16.6
Bone invasion	148	10.07
Pathological T category
T1	182	12.38
T2	1213	82.52
T3	61	4.15
T4	14	0.95
Pathological N category
N0	855	58.16
N1	422	28.71
N2a	119	8.1
N2b	57	3.88
N2c	17	1.16
N3	0
Clinical stage
I/II	1338	91.02
III/IV	132	8.98