BACKGROUND AND STUDY AIMS: Self-expandable metallic covered stents (SEMS) are widely used for the palliation of esophageal cancer. In the long term, a drawback of these stents is the occurrence of nontumoral occlusion at their proximal or distal parts. New self-expanding plastic stents (SEPS) may combine the advantages of SEMS with those of previously used plastic stents. Our aim was to study prospectively the implantation of such stents in a series of patients with fairly long life expectancy, focusing on safety, feasibility and long-term effectiveness. PATIENTS AND METHODS: Between June 1999 and December 2000, in a prospective cohort study, 33 patients were treated with Polyflex stents for palliation of esophageal stenoses, and were followed up until death. The inclusion criteria demanded the presence of a nonresectable or nonoperable, histologically proven, malignant stricture of the esophagus causing significant dysphagia. RESULTS: Stent insertion was successful in all cases. The mean duration of follow-up of the patients was 149.7 days (range 25 - 469). A complete follow-up until death was documented for all patients (n = 33). During the entire follow-up, no stent occlusion was observed which was caused by either nontumoral or tumoral ingrowth, or by nontumoral overgrowth. Stent occlusions were caused only by tumoral overgrowth, and occurred at a rate of 12.1 % (n = 4). The stent migration rate was 6.0 % (n = 2), and the re-intervention rate overall was 21.1 % (n = 7). CONCLUSIONS: These results show that SEPS are effective for the palliation of dysphagia in patients with esophageal malignancies. The immediate results are similar to those observed with SEMS, and the observed low rate of late obstruction suggests that their long-term efficacy might be superior to that of SEMS. This device warrants evaluation in a controlled prospective trial.
BACKGROUND AND STUDY AIMS: Self-expandable metallic covered stents (SEMS) are widely used for the palliation of esophageal cancer. In the long term, a drawback of these stents is the occurrence of nontumoral occlusion at their proximal or distal parts. New self-expanding plastic stents (SEPS) may combine the advantages of SEMS with those of previously used plastic stents. Our aim was to study prospectively the implantation of such stents in a series of patients with fairly long life expectancy, focusing on safety, feasibility and long-term effectiveness. PATIENTS AND METHODS: Between June 1999 and December 2000, in a prospective cohort study, 33 patients were treated with Polyflex stents for palliation of esophageal stenoses, and were followed up until death. The inclusion criteria demanded the presence of a nonresectable or nonoperable, histologically proven, malignant stricture of the esophagus causing significant dysphagia. RESULTS: Stent insertion was successful in all cases. The mean duration of follow-up of the patients was 149.7 days (range 25 - 469). A complete follow-up until death was documented for all patients (n = 33). During the entire follow-up, no stent occlusion was observed which was caused by either nontumoral or tumoral ingrowth, or by nontumoral overgrowth. Stent occlusions were caused only by tumoral overgrowth, and occurred at a rate of 12.1 % (n = 4). The stent migration rate was 6.0 % (n = 2), and the re-intervention rate overall was 21.1 % (n = 7). CONCLUSIONS: These results show that SEPS are effective for the palliation of dysphagia in patients with esophageal malignancies. The immediate results are similar to those observed with SEMS, and the observed low rate of late obstruction suggests that their long-term efficacy might be superior to that of SEMS. This device warrants evaluation in a controlled prospective trial.