Preliminary Evaluation of Esophageal Stenting for Recurrent Benign Esophageal Strictures in 1 Ferret and 2 Dogs
Benign esophageal strictures are uncommon in animals and can occur following gastroesophageal reflux, esophagitis, and foreign body ingestion. Most animals improve with balloon dilatation, however some recur even after numerous treatments. The purpose of this study was to evaluate the use of self-expanding mesh stents for the treatment of benign esophageal strictures after balloon dilatation was either unsuccessful or declined.
Owner consent was required and follow-up information collected. All stents were placed per os using both fluoroscopy and endoscopy.
Three cases were consecutively performed at three different institutions. All strictures were believed to have occurred from gastroesophageal reflux and esophagitis following a recent anesthetic episode. Balloon dilatation was performed in all cases before stenting (1 to 7 times) and following stenting (0 to 2 times). The ferret received an uncovered nitinol stent and required one additional balloon dilatation for stricture recurrence. The ferret is currently eating normal food 16 months post-stenting. Dog #1 received a covered nitinol stent to reduce stricture recurrence and permit stent removal following stricture resolution. Several hours after placement the stent migrated into the stomach and was endoscopically retrieved. The dog continues to do well 10 months later. Dog #2 received a bioabsorbable polydioxanone stent in order to permit stent absorption following stricture resolution. Endoscopic suturing was performed to prevent migration. This dog continues to do well 2 months post-stenting.
Preliminary experience suggests that stenting for benign esophageal strictures is feasible but can be associated with migration and stricture recurrence in certain circumstances.