The Presence of Mutations in the K-RAS Gene Does Not Affect Survival after Resection of Pulmonary Metastases from Colorectal Cancer

Table 1

Characteristics of the 90 patients included.

Variable	Number (percentage)
Origin
Rectum	56 (62.2%)
Colon	34 (37.8%)
Age
<65 years	38 (42.2%)
>65 years	52 (57.8%)
Median: 65.7 (range: 40–82), DT: 8.7
Associated comorbidity
Absent	38 (42.2%)
Present	52 (57.8%)
Preoperative level of carcinoembryonic antigen
Negative	55 (61.1%)
Positive	24 (26.7%)
Not measured	11 (12.2%)
Previous liver metastasis
No	73 (81.1%)
Yes	17 (18.9%)
Disease-free interval
<12 months	12 (13.3%)
>12 months	78 (86.7%)
Mean: 39.9 (range: 0–181.6), SD: 29.7
Access
VATS	7 (6.4%)^a
Thoracotomy	103 (93.6%)^a
Lymph node involvement
No	98 (89.1%)^a
Yes	12 (10.9%)^a
Size
<1 cm	13 (11.8%)^a
>1 cm	97 (88.2%)^a
Number of metastases
1	88 (80.0%)^a
>1	22 (20.0%)^a
Laterality of the metastases
Right	60 (54.5%)^a
Left	50 (45.5%)^a
Type of resection
Atypical	55 (50.0%)^a
Lobectomy	39 (35.5%)^a
Lobectomy + atypical	6 (5.5%)^a
Bilobectomy	1 (0.9%)^a
Pneumonectomy	5 (4.5%)^a
Lobectomy with chest wall resection	4 (3.6%)^a

aAs a percentage of the 110 surgical interventions performed. VATS: video-assisted thoracic surgery.