Effect of the Temporary Placement of Stent in Benign Pyloric Stenosis

Abstract

Backgrounds: In benign pyloric stenosis, endoscopic balloon dilatation has been used for a alternative treatment to surgery. But despite the technical advance, long term outcome of endoscopic dilatation is not satisfactory yet. The use of self-expandable metallic stents (SEMS) is an established palliative treatment of malignant stenosis in gastrointestinal tract. Stent application in benign stenosis can be expected to be beneficial due to more gradual and sustained dilatation in stenotic portion. But little information about the application of stent in benign pyloric stenosis. Aim: To evaluate the efficacy and safety of the temporary SEMS placement in benign pyloric stenosis. Patients & Methods: 8 patients with symptomatic pyloric stenosis due to recurrent duodenal ulcer were enrolled. SEMS (Niti-S® covered, Taewoong, Korea) was placed temporarily during 6 weeks. Symptom was assessed using the dysphagia score (G0, normal; G1, unable to swallow solids; G2, unable to swallow semisolids; G3, unable to swallow liquids; G4, unable to swallow own saliva). All data were collected prospectively. Results ; Success rate of stent implantation was 88% (7/8) and stent related early complication was 0%. During fallow-up time (from 1 week to 9 months), stent migration occurred in 57% (4/7). Symptom sore was improved in 71% (5/7). Conclusions: In benign pyloric stenosis, even though stent migration occurred frequently, temporary SEMS placement was effective for symptomatic improvement. Stent application may be a possible therapeutic tool in the selected patients.