Unusual gastric tumors and tumor-like lesions: Radiological with pathological correlation and literature review

Table 1 Characteristics of uncommon gastric tumors and tumor-like lesions

	CT features
Benign tumors
Glomus Tumor	Small, solitary, and hypervascular tumor at gastric antrum
Schwannoma	Homogeneous attenuated gastric tumor
Leiomyoma	Small, endoluminal growth, hypoenhanced tumor at gastric cardia
Lipoma	Fat contained tumor
Malignant tumors
Adenocarcinoma	Polypoid, or generalized mural thickening, or focal mural thickening with/without ulceration tumor
	The mucinous type has punctate or miliary calcification within the tumor
GIST	Exophytic hypervascular GI mass arising from submucosa with central ulceration, amorphous calcification
Lymphoma	Regional or diffuse wall thickening preserved perigastric fat plane and lymphadenopathy extending below the renal hila
Carcinoid	Type I and II, small, polypoid lesion, with marked enhancement. Type III, larger, sporadic, solitary tumor with distant metastasis
Tumor-like lesion
Ectopic pancreas	Small solitary lesion at greater curvature of distal antrum with enhancement similar to pancreas
Bezoar	Intraluminal gastric filling defect with mottled appearance

GIST: Gastrointestinal stromal tumor; CT: Computed tomography.