Table 1.
EUS features of subepithelial lesions (SELs) in the gastrointestinal tract.
| SEL Type | Originating Layer |
Echogenicity | Size (mm) |
Border | Location in Gastrointestinal Tract |
|---|---|---|---|---|---|
| Duplication cyst | 3rd | - | Sharp | Any | |
| Varices | 3rd | Anechoic, with doppler signal |
- | Sharp, serpiginous shape | Any |
| Gastric inflammatory polyp | 2nd, 3rd | Hypoechoic, homogeneous, polypoid |
8–20 | Variable | Antrum Small bowel |
| Neuroendocrine tumor | 2nd, 3rd | Hypoechoic, intermediate hypoechogenicity, Hyperechoic |
Variable | Sharp | Stomach Small bowel Rectum |
| Ectopic pancreas | 3rd, 4th | hypoechoic, heterogeneus echotexture, cyst or duct inside, central umbilication. |
<5–20 | Variable | Antrum Gastric body Duodenum |
| Leyomioma | 2nd, 4th | Hypoechoic, homogeneus. |
Variable | Sharp | Esophagus, Stomach, Anywhere in GI tract |
| GIST low risk | 2nd/4th | Hypoechoic, homogeneus, hypervascular. |
<30 | Regular | Esophagus, Stomach, Small Intestine, Rectum |
| GIST high risk | 2nd/4th | Hypoecoic, heterogeneus cystic space, echogenic foci, calcifications, dimpling or ulcers. |
>30 | Irregular | Esophagus, Stomach, Small Intestine, Rectum |
| Lymphoma | 2nd, 3rd, 4th | Hypoechoic | Variable | Irregular | Gastric, Small intestine |
| Schwannoma | 4th | Hypoechoic, homogeneous, marginal halo. |
- | Sharp | Gastric body |
| Lipoma | 3rd | Hyperechoic, Homogeneous. |
- | Irregular | Any |