“…Local factors include technique of stump closure, disruption of bronchial blood supply, a long bronchial stump, residual carcinoma at the bronchial margin, presence of empyema, extended resection, and preoperative radiotherapy, even if no single factor has been clearly identified [3,4]. Systemic factors include the patient's nutritional status, diabetes, presence of sepsis, and preoperative chemotherapy [5].…”