“…They are malignant tumors composed of undifferentiated small round cells, usually affecting children, adolescents, and young adults (Kondo et al, 2005) [ 7 ]. Generally ES/PNET affects the bones and deep soft tissues (Soulard et al, 2005) [ 8 ], although other organs such as the pancreas, small bowel, esophagus, kidneys, prostate, ovaries, vagina and rectovaginal septum have been reported; this is termed as extraskeletal ES/PNET (Bloom et al, 1995) [ 9 ]. To the best of our knowledge, only 5 cases of gastric ES/PNET have been reported in the English language literature.…”