Radiofrequency Ablation versus Transarterial Chemoembolization for Hepatocellular Carcinoma within Milan Criteria: Prognostic Role of Tumor Burden Score

Predictive Value of Radiographic Tumor Burden Score in Hepatocellular Carcinoma Within Milan Criteria After Microwave Ablation: Implications for Long-Term Outcomes and Treatment Planning

OBJECTIVE

This study aimed to investigate the predictive value of the radiographic tumor burden score (TBS) for long-term outcomes in hepatocellular carcinoma (HCC) patients meeting Milan criteria after microwave ablation (MWA) and to delineate its significance in guiding treatment planning.

METHODS

Retrospective analysis was conducted on clinical data from 198 HCC patients meeting Milan criteria, who underwent MWA at our hospital from January 2011 to December 2018. Using X-tile software, the optimal critical value of TBS was determined, leading to the categorization of patients into high- and low-TBS groups. Propensity score matching (PSM) was applied to balance covariates between these groups.

RESULTS

Before PSM, the 5-year overall survival (OS) rate and recurrence-free survival (RFS) rate in the high-TBS (47 cases) and low-TBS groups (151 cases) were 32.8% versus 59.7% (p = 0.033) and 23.4% versus 50.9% (p = 0.016), respectively. Following PSM, the 5-year OS rate and RFS rate in the high-TBS (44 cases) and low-TBS groups (95 cases) were 30.2% versus 64.1% (p = 0.011) and 21.9% versus 45.9% (p = 0.0059), respectively. Cox analysis identified high TBS and percutaneous microwave ablation (PMWA) as independent risk factors for OS and RFS. The stratified analysis revealed that the median RFS time for patients undergoing laparoscopic microwave ablation (LMWA) (20 cases) and PMWA (24 cases) in the high-TBS group (44 cases) was 45 and 10.5 months, respectively (p = 0.006).

CONCLUSION

TBS emerged as a robust predictor for the long-term outcomes of HCC within Milan criteria after MWA. A higher TBS was associated with a diminished long-term survival rate. Notably, among HCC patients meeting Milan criteria, those with TBS > 3 exhibited a prolonged median RFS time following LMWA compared to PWMA.

Assessing the Validity of the AASLD Surgical Treatment Algorithm in Patients with Early-Stage Hepatocellular Carcinoma

Background/Aims

The aim of this study was to investigate the effect of a surgical treatment algorithm recently proposed by the American Association for the Study of Liver Diseases (AASLD) on survival outcomes in patients with early-stage hepatocellular carcinoma (HCC) and identify effective alternative treatment modalities when liver transplantation (LT) is not available.

Methods

We studied the clinical data of 1,442 patients who were diagnosed with early-stage HCC (a single lesion measuring 2-5 cm in size or 2 to 3 lesions measuring ≤3 cm in size) between 2013 and 2018 and classified as Child-Turcotte-Pugh (CTP) A or B. Analyses were separately performed for individuals recommended for resection (single lesion, CTP A and no clinically significant portal hypertension) and those recommended for LT (single lesion with impaired liver function such as CTP B or clinically significant portal hypertension or multiple lesions).

Results

Of 791 patients recommended for surgical resection, 85.8% underwent resection. The 5-year survival rate was higher for patients who underwent surgical resection than for those who received other treatments (89.4% vs 72.3%). Among 651 patients recommended for LT, only 3.4% underwent the procedure. The most common alternative treatment modalities were transarterial therapy (39.3%) followed by resection (28.9%) and ablation (27.8%). The overall survival rate associated with transarterial therapy was lower than that for resection and ablation, whereas that of the latter two treatments were comparable.

Conclusions

The survival outcomes of treatment strategies that most closely aligned with the algorithm proposed by the AASLD were superior to those of alternative treatment approaches. However, LT in patients with early-stage HCC can be challenging. When LT is not feasible, resection and ablation can be considered first-line alternative options.

Tumor burden score combined with AFP and PIVKA-II (TAP score) to predict the prognosis of hepatocellular carcinoma patients after radical liver resection

BACKGROUND

Our study aimed to combine the morphological behavior (tumor burden score, TBS) and the biological behavior (AFP and PIVKA-II) to predict the prognosis of HCC patients after radical liver resection.

METHODS

A total of 1766 HCC patients were divided into the training cohort (n = 1079) and the validation cohort (n = 687) with a ratio of 6:4. The Kaplan-Meier method was used to analyze the recurrence-free (RFS) and overall survival (OS). The multivariable Cox regression model was established based on the variables screened by the least absolute shrinkage and selection operator (LASSO) regression to identify variables independently associated with recurrence-free survival (RFS) and overall survival (OS). Constructing our prognostic score (TBS-LN(AFP + PIVKA-II) score, TAP score) based on regression coefficients and the predictive ability of the TAP score was compared with Barcelona Clinic Liver Cancer (BCLC) stage.

RESULTS

The TAP score had good performance in stratifying RFS (p < 0.001) and OS (p < 0.001) in the training cohort and the validation cohort. There still existed significant differences in the intergroup comparisons among three TAP score groups for RFS and OS in the training cohort and the validation cohort. In our LASSO-Cox regression model, the TAP score was independently associated with RFS and OS. The TAP score also outperformed the BCLC stage in predicting RFS (1, 2 and 3 years) and OS (1, 3 and 5 years).

CONCLUSIONS

The TAP score had good performance in predicting the prognosis of HCC patients after radical liver resection and was superior to the BCLC stage.

Development and validation of a new prognostic tool for hepatocellular carcinoma undergoing resection: The Weighted Alpha-Fetoprotein Tumor Burden Score (WATS)

PURPOSE

This study aimed to develop and validate a novel prognostic index, the Weighted Alpha-Fetoprotein Tumor Burden Score (WATS), for predicting outcomes in hepatocellular carcinoma (HCC) patients undergoing resection.

MATERIALS AND METHODS

A total of 772 resected HCC patients were included. WATS was developed and validated using an 8:2 cohort split. The score was derived from multivariate Cox regression, resulting in the formula: WATS = 0.73 × tumor number +0.17 × tumor size +0.1 × ln AFP. The time-dependent ROC curve assessed the score's predictive ability, while restricted cubic splines evaluated the dose-response relationship between WATS and prognostic outcomes. Kaplan-Meier curves and multivariate Cox regression further validated the prognostic accuracy.

RESULTS

In the training cohort, AUCs for progression-free survival (PFS) at 1, 2, 3, 4, and 5 years were 0.683, 0.664, 0.661, 0.633, and 0.620, respectively; for overall survival (OS), they were 0.757, 0.732, 0.703, 0.672, and 0.670, respectively. In the validation cohort, AUCs for PFS were 0.711, 0.654, 0.671, 0.662, and 0.684, respectively; for OS, they were 0.724, 0.688, 0.642, 0.698, and 0.721, respectively. WATS outperformed other complex indicators and staging systems. RCS analysis showed a linear relationship between WATS and outcomes. The nomogram based on WATS demonstrated excellent discrimination, calibration, and clinical benefit.

CONCLUSION

WATS is a novel, reliable prognostic tool for HCC post-resection, offering enhanced patient stratification and risk assessment, thereby improving clinical management.

TACE-assisted multi-image guided radiofrequency ablation for the treatment of single hepatocellular carcinoma ≤ 5 cm: a retrospective study

Background/Objective

Treatment of hepatocellular carcinoma (HCC) with ablation alone often results in high rates of recurrence and metastasis, reaching up to 25.9% within two years. Therefore, this study aimed to examine the efficacy and safety of transarterial chemoembolization (TACE)-assisted multi-image guided radiofrequency ablation (RFA) for the treatment of stage Ia HCC according to the China liver cancer staging (CNLC).

Methods

This study enrolled and analyzed a total of 118 patients diagnosed with HCC, each with a single nodular lesion no larger than 5 cm, who received TACE-RFA as first-line therapy between February 1, 2014, and December 31, 2021. The median/mean follow-up period was 29.0 months [95% confidence interval (CI): 21.8-36.2 months] and 31.8 months (95% CI: 27.5-36.0 months), respectively. We assessed the treatment's effectiveness, potential complications, and survival rate.

Results

The technical success rate was 100% (118/118) after the initial treatment. Out of the total, 3 out of 118 patients (2.5%) developed local tumor progression (LTP) during the follow-up period. The median time for LTP was 29.0 months (95%CI: 21.9-36.1 months; mean: 31.5 months; range 1-92 months). At 1, 3, 5, and 7 years after treatment, the cumulative LTP rates were 0%, 4.6%, 4.6%, and 4.6%, respectively. The overall survival rates at 1, 3, 5, and 7 years were 100%, 95.2%, 95.2%, and 95.2%, respectively. In total, 28 patients experienced minor Grade B complications, and no major complications or treatment-related mortality occurred.

Conclusion

The treatment of CNLC stage Ia HCC using TACE-assisted multi-image-guided RFA was found to be both safe and feasible.

The tumor burden score may be a discriminator in microwave ablation versus liver resection for hepatocellular carcinoma within the Milan criteria: a propensity score matching and inverse probability of treatment weighting study

PURPOSE

This study aims to compare the prognostic outcome of resection (RES) and microwave ablation (MWA) in different tumor burden score (TBS) cohorts.

PATIENTS AND METHODS

We retrospectively analyzed 479 patients with primary hepatocellular carcinoma (HCC) who underwent RES (n = 329) or MWA (n = 150) with curative intent at our institution. We assessed their overall survival (OS) and progression-free survival (PFS) using the Kaplan-Meier curve. Propensity score matching (PSM) and inverse probability of treatment weighting (IPTW) were performed to minimize selection and confounding biases. Multivariate Cox regression was used to define the association between surgical modalities and outcomes.

RESULTS

Following PSM, in the TBS ≤3 cohort, the cumulative 1-, 3-, 5- year OS in the RES and MWA groups were 92.5% vs. 98.8%, 82.7% vs. 90.0%, and 82.7% vs. 83.2% (P = 0.366), respectively. The corresponding PFS rates in the RES and MWA groups were 82.7% vs. 88.0%, 63.6% vs. 68.3% and 55.2% vs. 56.3, respectively (P = 0.218). In the TBS >3 cohort, the cumulative 1-, 3-, 5- year OS between the RES and MWA groups were 92.5% vs. 95.0%, 82.8% vs. 73.2% and 76.3% vs. 55.1%, (P = 0.034), respectively. The corresponding PFS rates in the RES and MWA groups were 78.0% vs. 67.5%, 63.6% vs. 37.5% and 55.2% vs. 37.1%, respectively (P = 0.044). The IPTW analysis showed similar results as shown in PSM analysis. The multivariate Cox regression indicated that the type of surgical modality was not associated with a poorer prognostic outcome in the TBS ≤3 cohort, unlike in the TBS >3 cohort.

CONCLUSION

TBS, as a discriminator, might help guide treatment decision-making for HCC within the Milan criteria.