Staging of esophageal cancer by EUS: staging accuracy revisited.

ABSTRACT

BACKGROUND: EUS plays an important role in the preoperative staging of esophageal cancer. Recent data have called into question the staging accuracy of EUS, particularly in patients with early disease. OBJECTIVE: Our goals were to assess our institution's EUS staging accuracy by experienced endosonographers in a contemporary cohort of patients encompassing a wide range of disease stages and to assess staging accuracy after dilation of malignant strictures. DESIGN: Retrospective data review. SETTING: Single tertiary care center. PATIENTS AND INTERVENTIONS: A total of 42 patients with esophageal cancer undergoing preoperative EUS staging without neoadjuvant chemoradiotherapy between December 1999 and December 2004 were evaluated. MAIN OUTCOME MEASUREMENTS EUS T and N stage sensitivity, specificity, positive predictive value, negative predictive value, and accuracy. RESULTS: EUS accurately predicted T stage in 76% of cases and N stage in 89% of cases. Staging accuracy for T3 versus T1 and T2 disease and for N0 versus N1 disease was not significantly different. In 11 cases, malignant strictures required dilation, with 6 tumors being passable post dilation. Post dilation, T staging accuracy was 80% in impassable tumors and 100% in passable tumors, and N staging accuracy was 100% in the passable tumors. LIMITATIONS: Relatively small number of patients. CONCLUSIONS: EUS accurately predicts T and N stage in patients with a range of disease stages. EUS provides good staging accuracy after dilation of malignant strictures regardless of whether full tumor traversal post dilation is possible.