Primary gastric melanoma: A case report with imaging findings and 5-year follow-up

Table 1 Imaging findings of primary gastric melanoma in the literature and our case

Ref.	Modality	Imaging findings
Bolzacchini et al[2]	CT, MRI	A thickened stomach wall in the lesser curvature of the stomach, and metastasis to the liver and regional lymph nodes
Wang et al[11]	Digital GI radiography	A large tumor blocking the esophago-gastric junction
	CT	A soft mass in the esophago-gastric junction with lymph node metastasis in the lesser curvature of the stomach
Yılmaz et al[12]	CT	A large, heterogeneous, cystic solid tumor originating from the posterior wall of the stomach
Our case	Digital GI radiography	A tumor located in the gastric cardia; a thickened and rigid gastric wall with an inability to perform peristalsis
	CT	An iso-or slight low-density tumor in plain scanning, with heterogeneous enhancement in the arterial phase and persistent enhancement in the portal vein phase
	MRI	A mass exhibiting a heterogeneous hyperintensity on T1WI and hypointensity on T2WI; hyperintense signal on DWI; a lesion obviously unevenly enhanced

CT: Computed tomography; MRI: Magnetic resonance imaging; GI: Gastrointestinal; T1WI: T1-weighted imaging; T2WI: T2-weighted imaging; DWI: Diffusion-weighted imaging.