Table 1.

Characteristics of 83 microwave ablation procedures, by primary tumour type

Variable	HCC	CLM	MC	Other cancer	Total	P-value
	n = 10	n = 39	n = 20	n = 14	n = 83
Median age, years (range)	71 (56–88)	62 (38–84)	58 (25–82)	58 (42–76)	60 (25–88)	.050
Gender, n (%)						.023
Female	2	14	12	10	38 (46)
Male	8	25	8	4	45 (54)
Descent, n (%)						.563
Caucasian	7	33	18	13	71 (86)
African-American	3	4	2	1	10 (12)
Hispanic		2			2 (2)
Synchronous, n (%)						<0.001
Yes	—	30	12	1	43 (61)
No	—	9	7	12	28 (39)
Route of ablation, n (%)						.001
Open	4	34	20	8	66 (80)
Laparoscopic	3	3		4	10 (12)
Percutaneous	3	2		2	7 (8)
Number of tumours ablated, n (%)						.004
1	9	26	6	12	53 (64)
2	1	10	6	1	18 (22)
≥3		3	8	1	12 (14)
Median ablated tumour size, cm (range)	2.0 (0.9–3.0)	1.5 (1.0–5.5)	1.6 (1.0–5.0)	2.2 (0.9–3.0)	2.0 (0.9–5.5)	.161
Median no. probe applications (range)	2 (1–4)	2 (1–8)	2.5 (1–18)	2 (1–6)	2 (1–18)	.748
Median cumulative ablation time, min (range)	18 (10–40)	20 (5–70)	20 (5–180)	20 (10–60)	20 (5–180)	.850
Neoadjuvant chemotherapy, n (%)						<0.001
Yes		33	7	5	45 (54)
No	10	6	13	9	38 (46)
Adjuvant chemotherapy, n (%)						.055
Yes		15	9	4	28 (34)
No	10	23	11	10	54 (66)
Concomitant hepatectomy, n (%)						.227
None	7	13	4	9	33 (40)
Wedge resection/segmentectomy	2	10	7	2	21 (25)
Sectionectomy	1	9	6	2	18 (22)
Lobectomy		7	2	1	10 (12)
Extended lobectomy			1		1 (1)
Extrahepatic disease, n (%)						.018
None present	9	35	11	12	67 (81)
Present and resected	1	4	8	1	14 (17)
Present, but unresectable			1	1	2 (2)

HCC, hepatocellular carcinoma; CLM, colorectal liver metastases; MC, metastatic carcinoid.