Table I.

Clinicopathological features of patients with brain-specific metastasis and patients in control group 1.

Clinicopathological feature	Brain metastasis (no. of cases)	Control group 1 (no. of cases)
Age (years)
<40	4	3
40–50	6	5
50–60	15	15
60–70	7	8
>70	2	3
Gender
Male/Female	22/12	21/13
Surgical pattern
R. upper lobe	8	9
R. lower lobe	7	8
R. middle lobe	2	1
R. middle and lower lobes	3	2
R. whole lung	1	1
L. upper lobe	6	6
L. lower lobe	5	6
L. whole lung	2	1
Pathological type
Adenocarcinoma	17	18
Squamous cell carcinoma	14	14
Large cell carcinoma	3	2
Degree of differentiation
Well differentiated	13	13
Poorly differentiated	18	19
Undifferentiated	3	2
T status
T1/T2/T3/T4	5/16/8/5	6/17/8/3
N status
N0/N1/N2	7/15/12	8/17/9
Post-operative adjuvant chemotherapy
Yes/No	30/4	31/3
Diagnosis of brain metastases
Pathology/Imaging	16/18	0
Transfer time from surgery
<6 months	2
6–12 months	6
12–24 months	12
24–36 months	9
>36 months	5

R, right; L, left.