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Stent Collapse as a Delayed Complication of Placement of a Covered Gastroduodenal Stent

Jin Hyoung Kim1, Ho-Young Song1, Ji Hoon Shin1, Eugene Choi1, Tae Won Kim2, Sung Koo Lee2 and Byung Sik Kim3

1 Department of Radiology, Asan Medical Center, 388-1 Pungnap-2dong, Songpa-gu, Seoul, Seoul, South Korea 138-736.
2 Department of Internal Medicine, Asan Medical Center, Seoul, South Korea 138-736.
3 Department of Surgery, Asan Medical Center, Seoul, South Korea 138-736.


Figure 1
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  		Fig. 1A —Stents. Photograph shows polyurethane-covered nitinol stent (type A).

 

Figure 2
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  		Fig. 1B —Stents. Photograph shows type B stent, which consists of type A stent inside bare stent.

 

Figure 3
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  		Fig. 1C —Stents. Photograph shows type C stent, which consists of bare stent and partially covered stent designed for coaxial placement.

 

Figure 4
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  		Fig. 2A —54-year-old man with stent collapse. Upper gastrointestinal radiograph after passage of sizing gastric coil catheter over guidewire to distal part of collapsed stent and injection of water-soluble nonionic contrast medium through catheter shows collapsed stent in peripyloric region.

 

Figure 5
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  		Fig. 2B —54-year-old man with stent collapse. Upper gastrointestinal radiograph shows successful insertion of stent delivery system and loading of 0.229-mm-wire inner bare stent (arrowheads) through collapsed stent.

 

Figure 6
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  		Fig. 2C —54-year-old man with stent collapse. Upper gastrointestinal barium radiograph obtained with water-soluble nonionic contrast medium immediately after coaxial placement of second bare stent into collapsed stent shows good downstream passage of contrast medium.

 

Figure 7
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  		Fig. 3A —62-year-old man with gastric cancer. Upper gastrointestinal barium radiograph 3 days before stent placement shows malignant stricture (arrow) in peripyloric region.

 

Figure 8
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  		Fig. 3B —62-year-old man with gastric cancer. Upper gastrointestinal barium radiograph 1 day after placement of type C stent shows fully expanded stent (arrow) and good barium passage.

 

Figure 9
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  		Fig. 3C —62-year-old man with gastric cancer. Fluoroscopic image 116 days after stent placement shows collapsed stent (arrow).

 

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