Diagnostic Yield and Safety of Confocal Laser Endomicroscopy-Assisted Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration

Inclusion Criteria: 1. ≥18 years old 2. Patients with at least one mediastinal and/or hilar lymphadenopathy (≥1cm in the short axis) without a known or suspected primary lung cancer, required diagnostic bronchoscopy 3. The selected patients should complete the routine examination of EBUS-TBNA/EBUS-TBMC via a tunnel before operation, such as blood routine examination, coagulation function, electrocardiogram, chest CT, etc 4. There was no contraindication of puncture and cryobiopsy 5. Fully informed of the purpose and method of the study, agreed to participate in the study, and signed the informed consent form. Exclusion Criteria: 1. The lesion is a mediastinal cyst or abscess 2. The patient is allergic to lidocaine and midazolam （3) The site to be biopsied has a high risk of bleeding detected by Doppler and/or contrast CT such as bronchial artery penetration or suspected lung metastasis of renal cancer (4) Unstable angina pectoris, congestive heart failure, severe bronchial asthma