Hounsfield Units, Echogenicity and T2 Signals: Imaging of Cystic Structures in the Mediastinum

Abstract

278 A57-year-old man presented with an incidental finding of a right paratracheal mass. Computed tomography (CT) of the chest revealed a well demarcated, homogenous lesion 3 cm in size in the right paratracheal area (Figure 1). Bronchoscopy with endobronchial ultrasonography (EBUS) was performed with the intent of obtaining cytopathological samples. EBUS imaging revealed an anechoic lesion with negative Doppler signal. The lesion was believed to be consistent with a mediastinal cyst and, therefore, biopsies were not performed. Magnetic resonance imaging confirmed a fluid-filled structure and repeat CT imaging at one year showed stability in the lesion.