Extrapulmonary metastases impact survival outcomes of thermal ablation for colorectal lung oligometastases: A multicenter study

Table 1 Demographic and clinical characteristics of patients undergoing image-guided thermal ablation for colorectal lung metastases, mean ± SD/n (%)

Variables		Variables
Age (years)	61.1 ± 9.7	Presence of comorbidities	132 (39.3)
Sex (male)	209 (62.2)	CEA > 20 ng/mL	42 (12.5)
BMI (kg/m2)	20.9 ± 3.6	Extrapulmonary metastasis
Primary tumor location		Liver	70 (20.8)
Rectum	151 (44.9)	Bone	14 (4.2)
Sigmoid colon	68 (20.2)	Abdominal cavity	21 (6.3)
Descending colon	44 (13.1)	Pelvic cavity	18 (5.4)
Transverse colon	21 (6.3)	Other conditions	20 (6.0)
Ascending colon	52 (15.5)	T-stage
Tumor differentiation		T1	12 (3.6)
Poor	24 (7.1)	T2	34 (10.1)
Poor-to-moderate	55 (16.4)	T3	185 (55.1)
Moderate	147 (43.8)	T4	105 (31.3)
Moderate-to-well	70 (20.8)	DFI (< 24 months)	153 (45.5)
Well	40 (11.9)	ITGA therapy timing
Pneumoresection	31 (9.2)	Delayed ablation	111 (33.0)
Synchronous metastases	85 (25.3)	Synchronous ablation	62 (18.5)
CA19-9 > 37 U/mL	47 (14.0)	Upfront ablation	65 (19.3)
Interval between pulmonary resection and IGTA, median (IQR)	19.0 (28.0)	Interval from primary resection to IGTA (< 24 months), median (IQR)	28 (22.0)

IQR: Interquartile range; BMI: Body mass index; CA: Carbohydrate antigen; IGTA: Image-guided thermal ablation; CEA: Carcinoembryonic antigen; DFI: Disease-free interval from primary resection to diagnosis of metastases.