Abstract
Objectives
To compare the incidence of persistent air leak (PAL) following cryoablation vs MWA of lung tumors when the ablation zone includes the pleura.
Methods
This bi-institutional retrospective cohort study evaluated consecutive peripheral lung tumors treated with cryoablation or MWA from 2006 to 2021. PAL was defined as an air leak for more than 24 h after chest tube placement or an enlarging postprocedural pneumothorax requiring chest tube placement. The pleural area included by the ablation zone was quantified on CT using semi-automated segmentation. PAL incidence was compared between ablation modalities and a parsimonious multivariable model was developed to assess the odds of PAL using generalized estimating equations and purposeful selection of predefined covariates. Time-to-local tumor progression (LTP) was compared between ablation modalities using Fine-Gray models, with death as a competing risk.
Results
In total, 260 tumors (mean diameter, 13.1 mm ± 7.4; mean distance to pleura, 3.6 mm ± 5.2) in 116 patients (mean age, 61.1 years ± 15.3; 60 women) and 173 sessions (112 cryoablations, 61 MWA) were included. PAL occurred after 25/173 (15%) sessions. The incidence was significantly lower following cryoablation compared to MWA (10 [9%] vs 15 [25%]; p = .006). The odds of PAL adjusted for the number of treated tumors per session were 67% lower following cryoablation (odds ratio = 0.33 [95% CI, 0.14–0.82]; p = .02) vs MWA. There was no significant difference in time-to-LTP between ablation modalities (p = .36).
Conclusions
Cryoablation of peripheral lung tumors bears a lower risk of PAL compared to MWA when the ablation zone includes the pleura, without adversely affecting time-to-LTP.
Key Points
• The incidence of persistent air leaks after percutaneous ablation of peripheral lung tumors was lower following cryoablation compared to microwave ablation (9% vs 25%; p = .006).
• The mean chest tube dwell time was 54% shorter following cryoablation compared to MWA (p = .04).
• Local tumor progression did not differ between lung tumors treated with percutaneous cryoablation compared to microwave ablation (p = .36).
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Abbreviations
- CI:
-
Confidence interval
- HU:
-
Hounsfield units
- IGTA:
-
Image-guided thermal ablation
- LTP:
-
Local tumor progression
- MWA:
-
Microwave ablation
- OR:
-
Odds ratio
- PAL:
-
Persistent air leak
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Acknowledgements
M.A.K. is grateful for support from the Rolf W. Günther Stiftung für Radiologische Wissenschaften.
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The scientific guarantor of this publication is Florian J. Fintelmann.
Conflict of interest
Florian J. Fintelmann received salary support from the William M. Wood Foundation for related research during the study period and is a consultant for Pfizer. The other authors have no relevant conflicts of interest to report.
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Study subjects or cohorts overlap:
The cohort (but not the analysis) of the current study overlaps with two previously published reports in that 125 tumors in 37 patients were part of prior investigations.
a) Reference #16
Comparison of Percutaneous Image-Guided Microwave Ablation and Cryoablation for Sarcoma Lung Metastases: A 10-Year Experience. AJR Am J Roentgenol. 2022 Mar;218(3):494–504. https://doi.org/10.2214/AJR.21.26551. Epub 2021 Oct 6. Bourgouin PP, Wrobel MM, Mercaldo ND, Murphy MC, Leppelmann KS, Levesque VM, Muniappan A, Silverman SG, Shepard JO, Shyn PB, Fintelmann FJ.
Here we assessed overall survival and local tumor progression of pulmonary sarcoma metastases treated with percutaneous microwave and cryoablation.
b) Reference #17
Outcomes Following Percutaneous Microwave and Cryoablation of Lung Metastases from Adenoid Cystic Carcinoma of the Head and Neck: A Bi-Institutional Retrospective Cohort Study. Ann Surg Oncol. 2021 Oct;28(11):5829–5839. https://doi.org/10.1245/s10434-021-09714-4. Epub 2021 Feb 23. Leppelmann KS, Levesque VM, Bunck AC, Cahalane AM, Lanuti M, Silverman SG, Shyn PB, Fintelmann FJ.
Here we assessed overall survival and local tumor progression of Adenoid Cystic Carcinoma of the Head and Neck metastases treated with percutaneous microwave and cryoablation.
The current study differs in that the focus is persistent air leaks following percutaneous lung ablation of peripheral lung tumors, regardless of histology.
Methodology
• retrospective
• observational
• multicenter study
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Abrishami Kashani, M., Murphy, M.C., Saenger, J.A. et al. Risk of persistent air leaks following percutaneous cryoablation and microwave ablation of peripheral lung tumors. Eur Radiol 33, 5740–5751 (2023). https://doi.org/10.1007/s00330-023-09499-y
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DOI: https://doi.org/10.1007/s00330-023-09499-y