Plastic versus metal stents for transmural drainage of walled-off necrosis with significant solid debris: a randomized controlled trial.

This is likely because the larger diameter of the metal stent may not confer an actual advantage over multiple smaller-caliber plastic stents when the solid debris in the WON increases significantly. In the metal stent group, a higher number of patients required direct necrosectomy or percutaneous catheter drainage compared with the plastic stent group; however, this difference did not reach statistical significance.

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