Background Esophageal obstruction due to cancer can producedebilitating dysphagia. Rapid palliation is usually possiblewith endoscopic placement of a plastic esophageal prosthesis,but this device has a high rate of complications. A new alternativeis a metal-mesh stent that collapses to 3 mm in diameter atplacement but can then expand up to 16 mm.
Methods Patients with esophageal carcinoma (39 patients) ormalignant extrinsic obstruction (3 patients) were randomly assignedto treatment with either a plastic prosthesis (16 mm in diameter)or an expansile metal-mesh stent. The patients were evaluatedevery six weeks until death. The degree of palliation was expressedas a dysphagia score and a Karnofsky performance score.
Results Complications were significantly less frequent withthe metal stents than with the plastic prostheses (no complicationsvs. nine; P<0.001). The dysphagia and Karnofsky scores improvedsignificantly and to a similar degree in both treatment groups.The most common causes of recurrent dysphagia were migrationof the plastic prostheses (five patients) and ingrowth or overgrowthof the metal stents by tumor (five patients). The rates of reinterventionwere similar in both treatment groups, as were the 30-day mortalityrates. The period of hospitalization after placement of a prosthesiswas significantly longer in the group given plastic prosthesesthan in the group given metal stents (mean ±SE, 12.5±2.1 vs. 5.4 ±1.0 days; P = 0.005). Despite theirhigher initial cost, the metal stents were cost effective becauseof the absence of fatal complications and the decrease in thehospital stay.
Conclusions Expansile metal stents are a safe and cost-effectivealternative to conventional plastic endoprostheses in the treatmentof esophageal obstruction due to inoperable cancer.
Source Information
From Medizinische Klinik I (K.K.) and the Institut fur Rontgendiagnostik (H.-J.W.), Stadtische Kliniken, Kassel, Germany; Innere Abteilung IV, Krankenhaus Neukolln, Berlin, Germany (N.B.); the Medizinische Klinik, Kreiskrankenhaus, Bad Hersfeld, Germany (M.K.); and the University of Rochester Medical Center, Rochester, N.Y. (N.V.). Presented in part at the plenary session of the American Society of Gastrointestinal Endoscopy, Boston, May 19, 1993.
Address reprint requests to Dr. Knyrim at Med. Klin. I., Stadt. Kliniken, Monchebergstr. 41, 3500 Kassel, Germany.
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