EUS of the gastric wall reveals five distinct layers: the first layer is the interface echo between the superficial mucosa and the acoustic coupling medium; the second layer is the deep mucosa; the third layer is the submucosal layer; the fourth layer is the muscularis propria; and the fifth layer comprises the serosa and subserosal fat.

2022年7月13日 · EUS serves 2 roles in the diagnosis and management of SEL: (1) to characterize whether a lesion is intramural or extramural, the layer of origin, size, echogenicity of the lesion, and presence of blood vessels on Doppler flow, all of which have diagnostic and prognostic implications; and (2) for tissue acquisition.

2017年3月3日 · Gastrointestinal wall is detected as a five-layer structure with lower frequency (7.5–12 MHz) and a nine-layer structure with higher frequency (12–20 MHz) (Fig. 1). Then, using EUS, it has become possible to diagnose subepithelial lesions by evaluating its originating layer, its echo level, and its internal echo pattern etc.

Diagnostic Endoscopic ultrasonography (EUS) has the ability to differentiate intramural tumors from extraluminal compressions and can also show the layer of origin of gastric SMTs. Tumors can be further characterized by their layer of origin, echo pattern and margin.

The five layers of the gastric wall at EUS, from inner to outer: innermost two layers (white and black) = mucosa, third layer (white) = submucosa, fourth layer (black) = muscularis propria, fifth layer (white) = serosa.

By contrast, endoscopic ultrasonography can characterize such masses and determine if the lesion is intramural or extramural (or both), identify the GI wall layer (s) of origin, and guide tissue acquisition for studies that include histology, cytology, immunohistochemistry, and flow cytometry.

EUS images of organs, large vessels and lymph nodes contiguous to the GI tract each have their own characteristic appearance from seven standard position 7 used for orientation and finding anatomical landmarks. The normal anatomy of the oesophagus, stomach, pancreas, retroperitoneurn and hepatobiliary tract have been described previously.

On EUS, the GI wall appears in 5 layers (Figs 1, 2). Optimal imaging of the GI wall is essential to determine the wall layers affected by disease. With the sonographic plane oriented as close as possible to perpendicular to the intestinal wall, optimal imaging and limitation of …

2016年4月15日 · Gastric varices can be misdiagnosed endoscopically as submucosal tumors or thickened gastric folds. EUS will reveal varices as small, round to oval, and anechoic structures or tubular hypoechoic or anechoic structure within the submucosa (the third EUS layer) that demonstrates venous flow when evaluated with Doppler. When gastric varices grow ...

In this study, we report two cases of histologically and immunohistochemically confirmed rectal GISTs diagnosed using Endoscopic ultrasound (EUS) with fine needle aspiration (FNA), a procedure of...