P-LUM-11: Comparison of diagnostic yield of endoscopic ultrasound-guided fine needle aspiration cytology or cellblock in solid lesions

S14 ENDOSCOPIC ULTRASOUND / VOLUME 6 / SUPPLEMENT 1 / AUGUST 2017 P-LUM-10 Transaortic endoscopic ultrasound-guided fine needle aspiration in the diagnosis of lung cancers and mediastinal lymph nodes Piyush Somani, Malay Sharma Jaswant Rai Speciality Hospital, Meerut, Uttar Pradesh, India Background: Obtaining a tissue diagnosis from a lung tumor or a mediastinal lymph node located lateral to aorta (paraaortal) is a diagnostic challenge. Invasive surgical procedures such as mediastinotomy, thoracotomy, or video-assisted thoracic surgery are required for the diagnosis of these lesions. Lymph nodes on the “far side” of major blood vessels can be visualized by endoscopic ultrasound (EUS); however, fine needle aspiration (FNA) is avoided due to concern for bleeding complications. Objectives: To evaluate the feasibility, yield, and safety of EUS-guided transaortic FNA of lung tumors and para-aortic lymph nodes. Methods: A retrospective case series of 12 consecutive patients with suspected lung cancer or tuberculosis who underwent transaortic fine needle aspiration cytology during a study period of 7 years. In all cases, the para-aortal lesion was the only site suspicious for malignancy/ tuberculosis (other lesion/lymph node if present were negative). Seven patients had left-sided lung mass (mean size 30 mm). Four patients had enlarged para-aortic lymph node (mean size 18 mm, range 8–22 mm). All aspirates were obtained under real-time US-guided FNA using a 22/25-gauge needle. A single real-time FNA of the lung mass or lymph node was performed. Results: The final diagnosis was known in 11 patients (seven lung carcinoma, three tuberculosis, and one thymolipoma). EUS-FNA established diagnosis in 9 of 12 patients (75%). One aspirate revealed reactive nodal tissue, and one demonstrated nonrepresentative material. One procedure was abandoned due to complication. Conclusions: This case series demonstrates the feasibility and probable safety of single EUS-guided transaortic aspiration in para-aortic lesions. The diagnostic yield is 75%. DOI: 10.4103/2303-9027.212326