BORIS - aBlação pOR mIcro-ondaS [Microwave Ablation]

Inclusion Criteria: * Patients over 18 years; * Patients with lung metastases arising from sarcoma; * Patients who are not eligible for surgery for medical reasons, including limited cardiopulmonary reserve. In this cases we will perform a pulmonary function test (PFT) to determine if the patient can withstand ablation; * Patients with recurrent metastases after pneumectomy or metastases after surgical resection. In this cases we will perform a PFT to determine if the patient can withstand ablation; * Patients with pulmonary lesions with dimensions up to 3,0 cm in the largest axial diameter; * Patients with four or fewer lesions. In cases of bilateral metastases, we will evaluate the treatment of only one lung at a time, with an interval of at least two weeks for the treatment of the contralateral lung, respecting the clinical evolution of the patient. * Patients with no extrapulmonary metastases or just indolent extrapulmonary disease; * Patients with prior histopathological confirmation of pulmonary lesions. Exclusion Criteria: * Patients with primary disease without clinical control; * Presence of uncontrolled extrapulmonary disease, including lymph node progression; * Presence of hilar lesions or near the main bronchi; * Presence of five or more lung lesions and/or lesions larger than 3,0 cm in greatest axial length; * Presence of tumors infiltrating the chest wall, mediastinal and/or pleural dissemination; * Patients with severe coagulopathy (international normalized …