Abstract
Background: Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is well established for the staging and diagnosis of lung cancer and mediastinal lymphadenopathy. Central mediastinal vascular structures may preclude EBUS-TBNA access to lymph nodes in the aortopulmonary window and certain centrally located parenchymal lesions. Thus, a transvascular approach is necessitated. Few such reports exist in the literature.
Methods: We retrospectively analyzed the results of endobronchial ultrasound-guided transvascular needle aspiration (EBUS-TVNA) performed over 1 year to sample mediastinal lymph nodes (stations: 5) and lung lesions inaccessible by standard bronchoscopy or EBUS-TBNA. Data regarding the indication, location, size, and relationship to adjacent blood vessels, the number of transvascular passes, EBUS-TVNA diagnosis, the final diagnosis, procedural images, and complications were collected. Patients' charts were reviewed for 6 months after the procedure for evidence of late complications, including mediastinitis or mediastinal hemorrhage.
Results: Of 865 EBUS-TBNA procedures, 10 were performed by traversing the pulmonary artery or its branches. Nine were for left-sided lesions, 3 for hilar parenchymal nodules, 6 for hilar or mediastinal LN, and the remainder for a right-sided mass. Rapid-onsite evaluation was either diagnostic or positive for lymphoid cells in 9 patients and the final cytopathology was diagnostic in 9 patients: 5 non-small cell lung cancer, 1 small cell cancer, 1 metastatic colon cancer, and 2 normal lymphoid tissue. One patient had necrosis and required video assisted thoracoscopic surgery to diagnose histoplasmosis. Bleeding was insignificant, with no short-term/long-term complications.
Conclusions: From our single-center experience, we conclude that in experienced hands, EBUS-TVNA is feasible, with a high yield, but without complications. Larger prospective trials are warranted to explore its diagnostic potential.