Table 2.
Clinicopathological and procedural characteristics of HCC and CRLM according to ablation device
| RFA | MWA_A | MWA_B | |||||||
|---|---|---|---|---|---|---|---|---|---|
| HCC | CRLM | p value | HCC | CRLM | p value | HCC | CRLM | p value | |
| R(AZ:E) (mL/kJ) | 0.22 (0.14–0.45) | 0.15 (0.14–0.22) | 0.110 | 0.81 (0.61–1.07) | 0.43 (0.35–0.61) | 0.001 | 0.67 (0.41–0.85) | 0.43 (0.35–0.61) | 0.040 |
| Tumor diameter (mm) | 23.2 (5.6) | 19.4 (8.2) | 0.227 | 27.9 (12.0) | 23.7 (13.2) | 0.377 | 23.8 (10.1) | 24.5 (9.9) | 0.722 |
| Peritumoral vessels >3mm | 3 | 5 | 0.682 | 6 | 9 | 0.466 | 7 | 3 | 0.245 |
| Ablation time (min) | 40 (22) | 76 (38.2) | 0.007 | 13 (9) | 21 (14) | 0.052 | 24 (11) | 25 (15) | 0.631 |
| Applied energy (kJ) | 222.5 (215.5) | 466.7 (300.4) | 0.022 | 98.2 (62.8) | 182.4 (140.7) | 0.043 | 127.1 (73.1) | 143.7 (87.1) | 0.817 |
| Needle positions (n) | 3.3 (1.1) | 4.2 (2.3) | 0.140 | 4.3 (2.9) | 5.2 (3.6) | 0.476 | 3.7 (1.5) | 4.0 (2.4) | 0.618 |
| Ablation zone volume (mL) | 31.6 (13.5–51.7) | 54.7 (33.2–67.2) | 0.050 | 69.5 (42.6–96.4) | 57.2 (25.8–88.6) | 0.548 | 81.6 (46.6–116.7) | 53.3 (21.1–85.6) | 0.134 |
| Tumor percent of ablation zone volume | 15.8 (8.2–22.8) | 5.8 (2.8–8.8) | <0.001 | 18.0 (6.0–30.0) | 10.9 (4.4–17.4) | 0.178 | 5.8 (4.6–7.0) | 14.9 (13.9–15.9) | 0.412 |
| Incomplete after 1 week of follow-up (n) | 2 | 2 | 1.000 | 3 | 4 | 0.666 | 1 | 2 | 0.543 |
Normally distributed data are presented as means (SD) and non-normally distributed data as medians (Q1–Q3)
RFA radiofrequency ablation, MWA microwave ablation, HCC hepatocellular carcinoma, CRLM colorectal liver metastasis, R(AZ:E) ratio of ablation zone volume to applied energy