Subepithelial Lesions (ACG 2022)

Question 1

5 SEL with malignant potential

Answer 1

Granular cell tumor (rare)
Duplication or bronchogenic cyst (extremely rare)
heterotopic pancreas (ER)
NET
GIST

Question 2

Hyperechoic lesion (one)

Answer 2

Lipoma

Question 3

Anechoic (two)

Answer 3

Vascular (Doppler positive)
Cyst (Doppler negative)

Question 4

Submucosa (6)

Answer 4

Granular cell
Varices
Heterotopic pancreas
NET
Schwannoma (usually MP)
Lipoma

Question 5

Muscularis Propria (6)

Answer 5

Heterotopic pancreas
NET (usually submucosa)
Schwannoma
GIST
Leiomyoma
Lymphangioma

Question 6

What is the size of gastric GIST to suggest resection due to malignant potential

*all nongastric GIST get resected

Answer 6

> 2cm

Question 7

Gastric NET (3 categories)

Answer 7

Type 1: chronic hypergastrinemia
2/2 atrophic gastritis
Type 2: chronic hypergastrinemia 2/2 tumor produced gastric
Type 3: sporadic, w/o hyperG, more aggressive

Question 8

Size for endoscopic resection of rectal NET (best prognosis)

Answer 8

< 1cm

Question 9

Malignant findings of GIST (4 total; if tumor has 3 or more think malignant)

Answer 9

1. More than 3cm
2. Nodular
3. Heterogenous
4. Anechoic area, ulceration