title: Effects of the temporary placement of a self-expandable metallic stent in benign pyloric stenosis.
abstract: OBJECTIVE
  The use of self-expandable metallic stents (SEMS) is an established palliative treatment for malignant stenosis in the gastrointestinal tract; therefore, its application to benign stenosis is expected to be beneficial because of the more gradual and sustained dilatation in the stenotic portion. We aimed in this prospective observational study to evaluate the efficacy and safety of temporary SEMS placement in benign pyloric stenosis.
  
  
  METHODS
  Twenty-two patients with benign stenosis of the prepylorus, pylorus, and duodenal bulb were enrolled and underwent SEMS placement. We assessed symptom improvement, defined as an increase of at least 1 degree in the gastric-outlet-obstruction scoring system after stent insertion.
  
  
  RESULTS
  No major complications were observed during the procedures. After stent placement, early symptom improvement was achieved in 18 of 22 patients (81.8%). During the follow-up period (mean 10.2 months), the stents remained in place successfully for 6 to 8 weeks in seven patients (31.8%). Among the 15 patients (62.5%) with stent migration, seven (46.6%) showed continued symptomatic improvement without recurrence of obstructive symptoms.
  
  
  CONCLUSIONS
  Despite the symptomatic improvement, temporary SEMS placement is premature as an effective therapeutic tool for benign pyloric stenosis unless a novel stent is developed to prevent migration.
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
authors.forename: Won Jae
authors.initials: WJ
authors.lastname: Choi
authors.forename: Jong-Jae
authors.initials: JJ
authors.lastname: Park
authors.forename: Jain
authors.initials: J
authors.lastname: Park
authors.forename: Eun-Hye
authors.initials: EH
authors.lastname: Lim
authors.forename: Moon Kyung
authors.initials: MK
authors.lastname: Joo
authors.forename: Jae-Won
authors.initials: JW
authors.lastname: Yun
authors.forename: Hyejin
authors.initials: H
authors.lastname: Noh
authors.forename: Sung Ho
authors.initials: SH
authors.lastname: Kim
authors.forename: Woo Seok
authors.initials: WS
authors.lastname: Choi
authors.forename: Beom Jae
authors.initials: BJ
authors.lastname: Lee
authors.forename: Ji Hoon
authors.initials: JH
authors.lastname: Kim
authors.forename: Jong Eun
authors.initials: JE
authors.lastname: Yeon
authors.forename: Jae Seon
authors.initials: JS
authors.lastname: Kim
authors.forename: Kwan Soo
authors.initials: KS
authors.lastname: Byun
authors.forename: Young-Tae
authors.initials: YT
authors.lastname: Bak
keywords: Benign pyloric stenosis; Self-expandable metallic stent
references.citation: Endoscopy. 1996 Sep;28(7):552-4
references.pmid: 8911802
references.citation: Digestion. 2006;74(3-4):199-205
references.pmid: 17341853
references.citation: Surg Endosc. 2008 Feb;22(2):454-62
references.pmid: 17704890
references.citation: J Vasc Interv Radiol. 2005 Feb;16(2 Pt 1):247-53
references.pmid: 15713926
references.citation: Radiology. 1997 Apr;203(1):131-6
references.pmid: 9122381
references.citation: Endoscopy. 2003 Jun;35(6):490-5
references.pmid: 12783346
references.citation: Am J Gastroenterol. 2009 Oct;104(10):2404-11
references.pmid: 19707192
references.citation: Gastrointest Endosc. 2007 Aug;66(2):256-64
references.pmid: 17643698
references.citation: Surg Laparosc Endosc Percutan Tech. 2007 Feb;17(1):5-9
references.pmid: 17318045
references.citation: Endoscopy. 2005 Jan;37(1):74-81
references.pmid: 15657863
references.citation: Radiology. 2002 Jun;223(3):715-22
references.pmid: 12034940
references.citation: Br J Surg. 1989 Nov;76(11):1147-8
references.pmid: 2597970
references.citation: Radiology. 1993 Jun;187(3):667-71
references.pmid: 8497612
references.citation: Acta Radiol. 2001 Mar;42(2):176-80
references.pmid: 11259946
references.citation: Surg Endosc. 2012 Jan;26(1):53-9
references.pmid: 21792721
references.citation: Gastrointest Endosc. 1997 Dec;46(6):552-5
references.pmid: 9434226
references.citation: Br J Surg. 2004 Feb;91(2):205-9
references.pmid: 14760669
references.citation: Gastrointest Endosc. 1997 Feb;45(2):179-82
references.pmid: 9041006
references.citation: Z Gastroenterol. 2001 Nov;39(11):957-60
references.pmid: 11778154
references.citation: World J Gastroenterol. 2004 Feb 1;10(3):410-4
references.pmid: 14760768
references.citation: Eur J Radiol. 2002 Jun;42(3):240-8
references.pmid: 12044702
references.citation: Gastrointest Endosc. 1996 Feb;43(2 Pt 1):98-101
references.pmid: 8635729
references.citation: Anticancer Res. 2004 Jan-Feb;24(1):269-71
references.pmid: 15015607
references.citation: BMC Gastroenterol. 2007 Jun 08;7:18
references.pmid: 17559659