Erschienen in:
15.09.2015 | Interventional
Effectiveness and safety of computed tomography-guided radiofrequency ablation of renal cancer: a 14-year single institution experience in 203 patients
verfasst von:
Jason D. Iannuccilli, Damian E. Dupuy, Michael D. Beland, Jason T. Machan, Dragan J. Golijanin, William W. Mayo-Smith
Erschienen in:
European Radiology
|
Ausgabe 6/2016
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Abstract
Objectives
To define effectiveness and safety of CT-guided radiofrequency ablation (RFA) of renal tumours and prognostic indicators for treatment success.
Methods
Patients with a single treatment of a solitary, biopsy-proven renal tumour with intent to cure over a 14-year period were included (n = 203). Probability of residual disease over time, complication rates and all-cause mortality were assessed in relation to multiple variables.
Results
Mean tumour size was 2.5 cm (range 1.0–6.0). Mean follow-up was 34.1 months (range 1–131). There was an increase in likelihood of residual disease for tumours ≥3.5 cm (P < 0.05), clear cell subtype of renal cell carcinoma (P ≤ 0.005) and maximum treatment temperature ≤70 °C (P < 0.05). There was a decrease in likelihood of residual disease for exophytic tumours (P = 0.01) and no difference based on age, gender, tumour location or type of radio freqency (RF) electrode used. Major complications occurred in 3.9 %. Median post-treatment survival was 7 years for patients with tumours <4 cm, and 5-year overall survival was 80 %. Probability of minor complication increased with tumour size (P = 0.03), as did all-cause mortality (P = 0.005).
Conclusions
CT-guided RFA is safe and effective for early-stage renal cancer, particularly for exophytic tumours measuring <3.5 cm. Overall 5-year survival with tumours <4 cm is comparable to partial nephrectomy.
Key points
• Prognostic indicators for success of CT-guided RFA of renal tumours are reported.
• Tumour size ≥3.5 cm confers an increased risk for residual tumour.
• Clear cell renal cell carcinoma subtype confers increased risk for residual tumour.
• Tmax <70 °C within the ablation zone confers increased risk for residual tumour.
• Exophytic tumours have a lower probability of residual disease.