The cancer is causing a narrowing (stricture) or blockage to the gullet or upper stomach, preventing fluid and/or food from passing into your stomach. Inserting a stent (flexible metal tube) through the stricture may improve the swallowing and allow you to drink and eat.re there any risks in having a stent fitted? Yes, there are possible risks with this procedure and the doctor fitting your stent will discuss these with you in more detail before you have this procedure. The risks include: perforation (making a hole in your oesophagus), bleeding and movement of the stent.