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Benign Mediastinal Lesions

M. Babitha Reddy¹, David H. Robbins¹, and Mohamad A. Eloubeidi²

¹ Lenox Hill Hospital, New York, NY, USA

² American University of Beirut School of Medicine, Beirut, Lebanon

Benign mediastinal lymphadenopathy is a common incidental finding during endoscopic ultrasound (EUS) (Figures 12.1–12.5). Benign enlarged mediastinal lymph nodes can be reactive lymph nodes from exposure to a pulmonary infection, or granulomatous lymph nodes from sarcoid, histoplasmosis, or tuberculosis. Echogenic features include a crescent or triangular shape. Sometimes there is a central hyperechoic strand suggestive of a blood vessel. The borders are irregular and the short axis is often less than 1 cm. There are often multiple lymph nodes. It is not uncommon to encounter the benign “draping” subcarinal lymph node, which can be ovoid, intermediate in echogenicity, and up to 2 cm in length.

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