Radiofrequency (RF) ablation has been around for decades — it's reliable and well‑studied. Microwave ablation is newer — it heats faster, creates larger zones, and is less affected by blood flow (heat sink). The tumor ablation market research shows that RF holds the largest share, but microwave is the fastest‑growing, with a CAGR above 12%. Why the shift? Because microwave can treat larger tumours in less time.

What's the catch? Microwave can cause collateral damage to nearby organs if not placed precisely. The tumor ablation market trends highlight that the fastest‑growing technology is irreversible electroporation (IRE), which uses electrical pulses to kill cells without heat — ideal for tumours near critical structures.

But RF is still preferred for small tumours (<2cm) and for tumours near the skin (less depth).

The bottom line: the best technology depends on tumour size, location, and operator experience. A good interventional radiologist will have multiple tools in their toolbox.