Hydrodissection technology versus thermal monitoring technology in ultrasound-guided percutaneous microwave ablation for renal cell carcinoma

Objective To evaluate hydrodissection technology versus thermal monitoring technology in ultrasound (US)-guided percutaneous microwave ablation (MWA) for T1a stage renal carcinoma located in dangerous location. Methods Totally 61 cases(mean diameter 2.8±0.7 cm) at T1a stage renal cell carcinoma (RCC) located in dangerous location were treated in our department from April 2006 to December 2017. According to the use of assistive technology, patients were divided into hydrodissectiom technology group and temperature monitoring group to compare the local tumor progression (LTP) rate and survival condition. Results There were 32 cases in the hydrodissection group and 29 cases in the thermal monitoring group. No significant difference in age, gender, maximum diameter, location, time of ablation and the power of ablation was found between the two groups (all P> 0.05). The technical efficiency after microwave ablation was 100% (61/61) in all patients. The LTP rate in hydrodissection group was significantly lower than that in thermal monitoring group (0 vs13.8%, P=0.042). No cancer-related death occurred in two groups. Conclusion The study results show that the effect of hydrodissection technology is superior to thermal monitoring technology in US guided percutaneous MWA for T1a RCC located in dangerous location.