The procedure began in standard ESD fashion with the injection of a liquid cushion into the submucosa and initial entry into the submucosa with the electrocautery device.
From the sciencedaily.com
This makes it possible to peel back the portion of the lesion now separated from the submucosa, clearing the view of the endoscopist for safer removal of the lesion.
From the sciencedaily.com
The submucosa consists of a dense irregular layer of connective tissue with large blood vessels, lymphatics, and nerves branching into the mucosa and muscularis externa.
From the en.wikipedia.org
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The connective tissue beneath mucous membrane
In the gastrointestinal tract, the submucosa is the layer of dense irregular connective tissue that supports the mucosa, as well as joins the mucosa to the bulk of underlying smooth muscle (fibers running circularly within layer of longitudinal muscle).
The layer of tissue under the mucosa (inner lining of some organs and body cavities that makes mucus).