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

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

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

Metastatic gastric melanoma are more common than primary ones；PGM are rare in clinic，and the related literature is also relatively scarce[2-5].Imaging examination is of great value in melanoma diagnosis and reexamination.To date，only three cases have applied CT or MRI examination（Table 1）.Bolzacchini et al[2]reported a case in which CT and MRI revealed a thickened stomach wall in the lesser curvature of the stomach，and metastasis to the liver and regional lymph nodes.Wang et al[11]reported a case of primary advanced esophagogastric melanoma.Digital GI radiography showed a large tumor blocking the esophago-gastric junction.CT revealed a soft mass in the esophagogastric junction with lymph node metastasis in the lesser curvature of the stomach.Y?lmaz et al[12]reported a PGM case with a synchronous gastric GI stromal tumor，for which CT showed a large，heterogeneous，cystic solid tumor originating from the posterior wall of the stomach.However，digital GI radiography，CT，and MRI results were not reported in the aforementioned cases.Thus，this is the first PGM case report presenting digital GI radiography，CT，and MRI results，along with followup records of up to 5 years.