Endoscopic ultrasonography is useful for monitoring the tumor response of neoadjuvant chemoradiation therapy in esophageal squamous cell carcinoma.

Background: Recently, neoadjuvant chemoradiation therapy (CRT) has been introduced for treatment of esophageal squamous cell carcinoma (ESCC). This study was performed to investigate the usefulness of endoscopic ultrasonography (EUS) in comparison with EUS findings before and after CRT, and histologic findings.

Methods: There were 33 patients with potentially resectable ESCC who underwent neoadjuvant CRT.