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Background: This retrospective study aimed to assess the safety and efficacy of microwave ablation for lung tumors adjacent to the interlobar fissures. Methods: From May 2020 to April 2021, 59 patients with 66 lung tumors (mean diameter, 16.9 ± 7.7 mm; range, 6–30 mm) adjacent to the interlobar fissures who underwent microwave ablation at our institution were identified and included in this study. Based on the relationship between the tumor and the interlobar fissure, tumors can be categorized into close to the fissure, causing the fissure, and involving the fissure. The complete ablation rate, local progression‐free survival, complications, and associated factors were analyzed. Results: All 66 histologically proven tumors were treated using computed tomography‐guided microwave ablation. The complete ablation rate was 95.5%. Local progression‐free survival at 3, 6, 9, and 12 months were 89.4%, 83.3%, 74.2%, and 63.6%, respectively. The complications included pneumothorax (34.8%), pleural effusion (24.2%), cavity (18.2%), and pulmonary infection (7.6%). There were statistical differences in the incidence of pneumothorax, cavity, and delayed complications between the groups with and without antenna punctures through the fissure. Conclusions: Microwave ablation is a safe and effective treatment for lung tumor adjacent to the interlobar fissure. Antenna puncturing though the interlobar fissure may be a potential risk factor for pneumothorax, cavity, and delayed complications. [ABSTRACT FROM AUTHOR]

Purpose: Invasive pulmonary aspergillosis (IPA) is a life-threatening complication of microwave ablation (MWA) during the treatment of primary or metastatic lung tumors. The purpose of this study was to investigate the clinical, radiological and demographic characteristics and treatment responses of patients with IPA after MWA. Materials and methods: From January 2011 to January 2016, all patients who were treated by MWA of their lung tumors from six health institutions were enrolled in this study. Patients with IPA secondary to MWA were identified and retrospectively evaluated for predisposing factors, clinical treatment, and outcome. Results: The incidence of IPA secondary to lung MWA was 1.44% (23/1596). Of the 23 patients who developed IPA, six died as a consequence, resulting in a high mortality rate of 26.1%. Using computed tomography (CT), pulmonary cavitation was the most common finding and occurred in 87.0% (20/23) of the patients. Sudden massive hemoptysis was responsible for one-third of the deaths (2/6). Most patients (22/23) received voriconazole as an initial treatment, and six patients with huge cavities underwent intracavitary lavage. Finally, 17 patients (73.9%) achieved treatment success. Conclusions: Lung MWA may be an additional host risk factor for IPA, particularly in elderly patients with underlying diseases and in patients who have recently undergone chemotherapy. Early and accurate diagnosis of IPA after MWA is critical for patient prognosis. Voriconazole should be given as the first-line treatment as early as possible. Bronchial artery embolization or intracavitary lavage may be required in some patients. [ABSTRACT FROM AUTHOR]

Purpose: The purpose of the study is to retrospectively evaluate the safety and efficacy of microwave ablation (MWA) for the treatment of ground-glass opacity (GGO)-lung adenocarcinoma.Materials and Methods: From December 2013 to June 2017, a total of 51 patients (22 males and 29 females, mean age of 69.4 ± 10.1 years) were included in this study, with 51 lung adenocarcinoma lesions showing GGO (mean long-axis diameter of 18.7 ± 6.05 mm). They received a total of 52 sessions of percutaneous computed tomography-guided (CT-guided) MWA. First, lung adenocarcinoma with GGO was histologically defined by needle biopsy under the guidance of CT. Second, the efficacy of CT-guided MWA was analyzed, including the feasibility, safety, 3 years local progression-free survival (LPFS), 3 years disease-specific survival, and 3 years overall survival (OS). Final, complications after MWA were also summarized.Results: The technical success rate was 100%, without MWA procedure-related death. At the median follow-up period (27.02, range: 7-45 months), the rates of 3 years LPFS, cancer-specific survival, and OS were 98%, 100%, and 96%, respectively. The complications after MWA included pneumothorax (48.1%, 25/52), hemoptysis (28.8%, 14/52), pleural effusion (23.1%, 12/52), and pulmonary infection (7.7%, 4/52).Conclusions: CT-guided percutaneous MWA was a feasible, safe, and effective therapeutic approach for treating GGO-lung adenocarcinoma. [ABSTRACT FROM AUTHOR]

Objectives: To verify the association between EGFR status and clinical response to microwave ablation (MWA) and survival.Methods: NSCLC patients with known EGFR status and treated with MWA in combination with chemotherapy were retrospectively enrolled in the study.Results: A total of 61 patients were recruited. EGFR mutations were found in 28 patients (39.4 %), and were more common in women (67.7 %) and nonsmokers (74.1 %). Complete ablation was achieved in 69.7 % of patients with EGFR mutant tumours and in 82.1 % of patients with EGFR wild-type tumours (p = 0.216). The median progression-free survival (PFS) and overall survival (OS) were 8.3 months and 27.2 months in patients with an EGFR mutant tumour. The corresponding values were 5.4 months (p = 0.162) and 17.8 months (p = 0.209) in patients with an EGFR wild-type tumour. Patients with complete ablation had longer PFS (7.8 months vs. 4.2 months, p = 0.024) and OS (28.1 months vs. 12.6 months, p = 0.001) than those with incomplete ablation. Multivariate analyses also showed that response to MWA was an independent prognostic factor for OS, but EGFR status was not, and that neither response to MWA nor EGFR status was a prognostic factor for PFS.Conclusions: The EGFR status was not related to response to MWA, and response to MWA was a predictor of survival.Key Points: • EGFR mutations were commonly seen in women and in nonsmokers • EGFR status had no correlation with the response to MWA, PFS and OS. • The response to MWA could predict PFS and OS. [ABSTRACT FROM AUTHOR]