Prognosticators and Risk Grouping in Patients with Lung Metastasis from Nasopharyngeal Carcinoma: A more accurate and appropriate assessment of prognosis

Table 1 Patient and disease characteristics of 198 NPC patients with lung metastasis

Characteristics	No. of Patients	%
Gender
Male	156	78.8
Female	42	21.2
Age (years)
Median		44.5
Range		20-80
≤45	108	54.5
>45	90	45.5
VCA-IgA
≤1:320	119	60.1
>1:320	79	39.9
EA-IgA
≤1:40	128	64.6
>1:40	70	35.4
Histology (WHO)
Type I	3	1.5
Type II	62	31.3
Type III	133	67.2
AJCC (2002)
T classification
T1-T2	83	41.9
T3-T4	115	58.1
N classification
N0-N1	115	58.1
N2-N3	83	41.9
Overall stage
I	5	2.5
II	43	21.7
III	108	54.5
IV	42	21.3
Site of metastases
Unilateral	94	47.5
Bilateral	104	52.5
Number of metastases
Solitary	65	32.8
Multiple	133	67.2
Size of metastases ^†
≤3 cm	142	71.7
>3 cm	56	28.3
Mediastinal nodal metastases ^‡
Absent	121	61.1
Present	77	38.9
Locoregional recurrence
Absent	175	88.4
Present	23	11.6
Secondary metastases
Absent	149	75.3
Present	49	24.7
DFI (months)
≤24	108	54.5
>24	90	45.5
Primary treatment
Radiotherapy	69	34.8
Chemoradiotherapy	129	65.2

Abbreviation: NPC, nasopharyngeal carcinoma; WHO: World Health Organisation; AJCC: American Joint Committee Cancer; DFI: disease-free interval.
^† A mass in diameter.
^‡ Size in the short-axis diameter.

ISSN: 1748-717X