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Endoscopic ultrasound (EUS) allows one to efficiently image the posterior mediastinum in search for lesions (1). In patients who present with dysphagia EUS has been shown to be useful, as it may help identify rare entities causing these symptoms (e.g. dysphagia lusoria caused by aberrant right subclavian artery; dysphagia caused by an anterior cervical spine osteophyte) (2-4). These infrequent causes of dysphagia and their EUS appearance were relatively unknown for most endosonographers until its recent publication in endoscopy journals (2-4). The case of a 62-year-old male with unremarkable past medical history who was referred for EUS due to unexplained dysphagia (normal manometry, radiology and endoscopy) is presented. EUS examination of the upper mediastinum showed no lesion or compression in the esophageal wall (vascular or spine) that may be responsible for symptoms. Surprisingly, when searching for causes of these symptoms we identified a “roundish” lesion posterior to the esophagus, with “solid and cystic/anechoic component”. The aforementioned lesion was only visible between two spinal vertebral bodies, at the level of the intervertebral disc that allowed ultrasound waves to reach the spinal cord (Figs. 1 and 2). This atypical finding may be difficult to interpret and may misslead the endosonographer towards an incorrect diagnosis like “posterior mediastinum tumor”.

EUS visualization of the spinal cord from the cervical esophagus: an unusual finding