Submucosal tunnelling and endoscopic resection (STER) is a combination of two endoscopic techniques commonly used in the diagnosis and treatment of gastrointestinal (GI) tumors.
Submucosal tunnelling involves creating a tunnel within the submucosal layer of the GI tract using an endoscope. This tunnel is then used to gain access to and remove tumors or other lesions within the submucosal layer. This technique is often used for the removal of gastrointestinal stromal tumors (GISTs) and other submucosal lesions.
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