Limited Effectiveness in Early Human Clinical Experience with Pulsed Electrical Field Ablation

Area of Science:

• Oncology
• Interventional Radiology
• Medical Technology

Background:

• Pulsed electrical field (PEF) ablation is an emerging technique for tumor treatment.
• Evaluating its efficacy and safety in various tumor locations is crucial.

Purpose of the Study:

• To assess oncological outcomes, including complete tumor coverage and progression.
• To investigate the abscopal effect of PEF ablation.
• To document adverse events (AEs) associated with PEF ablation.

Main Methods:

• Retrospective analysis of 11 patients undergoing 11 PEF ablation sessions for 13 tumors.
• Tumors included metastases and primary cancers in the chest, abdomen, and pelvis.
• Oncological outcomes, abscopal effect, and AEs were evaluated based on imaging and clinical data.

Main Results:

• Complete tumor coverage was achieved in only 9% of cases; 81% had residual tumor.
• 91% of patients experienced residual, local, or distant progression within 3 months.
• No abscopal effect was observed; 4 adverse events (2 mild, 2 severe) were reported.

Conclusions:

• PEF ablation demonstrated limited efficacy in achieving complete tumor coverage and controlling progression.
• The technique did not show an abscopal effect in this patient cohort.
• Further research is needed to optimize PEF ablation protocols and patient selection.