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Year : 2017  |  Volume : 130  |  Issue : 17  |  Page : 2027-2032

Thermal Ablation in the Management of Adrenal Metastasis Originating from Non-small Cell Lung Cancer: A 5-year Single-center Experience

1 First Pediatric Clinic, National and Kapodistrian University of Athens, Agia Sofia Children's Hospital, Athens 11527, Greece
2 Department of Medical Imaging and Interventional Radiology, Sotiria General Hospital for Chest Diseases, Athens 11527, Greece

Correspondence Address:
Evanthia I Botsa
First Pediatric Clinic, National and Kapodistrian University of Athens, Agia Sofia Children's Hospital, Thivon and Levadias, Goudi, Athens 11527
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0366-6999.210496

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Background: Treatment of adrenal metastasis from lung carcinoma may prolong survival in the selected patients. However, not all patients can undergo surgery; thus, minimally invasive ablation procedures such as radiofrequency ablation (RFA) and microwave ablation (MWA) have gained acceptance as alternative treatment methods. This study summarized a 5-year single-center experience regarding the evaluation of safety and efficacy of computed tomography (CT)-guided thermal ablation in the management of adrenal metastasis originating from non-small cell lung cancer (NSCLC). Methods: The data of NSCLC patients ablated for adrenal metastasis at the Department of Diagnostic Imaging and Interventional Radiology, General Hospital Sotiria, were retrospectively analyzed. Patients were divided into two groups: RFA group and MWA group according to the therapeutic approaches. Preprocedural blood tests included measurement of international normalized ratio, partial thromboplastin time, and platelet enumeration. A dual-phase contrast-enhanced spiral CT was performed immediately after the procedure to assess the immediate response after ablation and to screen for related complications. Follow-up was performed with CT or magnetic resonance imaging at 1, 3, 6 months and 1 year after ablation and every 6 months thereafter. Results: A total of 99 ablation sessions in 71 patients with adrenal metastasis originating from NSCLC were included in the final analysis. Self-limited, postablation syndrome occurred in 16/99 (16.1%) of ablation sessions. All procedures were technically successful. Immediate postablation imaging showed no contrast enhancement of the ablated tumor in all patients. Follow-up imaging at 3 months revealed local tumor progression in 8 (22.8%) patients of the RFA group and 7 (19.4%) patients of MWA group, all of them underwent a second session successfully. The 1-year assessment revealed local recurrence of the ablated tumor in six patients (17.1%) of RFA group and seven patients (19.4%) of MWA group. Among these 71 patients, those with tumor size >3.5 cm had a higher local recurrence rate (65.2%, 15/23) than those with tumors ≤3.5 cm (16.7%, 8/48; P = 0.012). There was no significant difference in the median survival time between RFA (14.0 months) and MWA (14.6 months) groups (P > 0.05). Conclusions: RFA and MWA showed comparable efficacy and safety in adrenal metastasis treatment.

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