Table 2. Reported Cases of Primary Ewing Sarcoma of the Stomach.

Case report	Age	Sex	Clinical presentation	Pre-operative diagnosis	Endoscopic findings	CT scan findings	Treatment	EWS/FLI1 fusion genetic mutation (11;22) translocation
Khuri et al, 2016 [9]	31	F	Abdominal pain and coffee ground vomiting (UGIB)	Confirmed	Large ulcerated mass at the lesser curvature	9-cm circumferential hypodense mass at the lesser curvature	Surgical resection	Positive
Soulard et al, 2005 [3]	66	F	Abdominal pain and vomiting	Not confirmed	Ulcerated mass at the antrum	Not available	Surgical resection	Positive
Hopp et al, 2019 [4]	24	M	Abdominal pain and vomiting	Confirmed	Ulcerated mass at the antrum	10-cm exophytic mass at posterior gastric wall	Neoadjuvant chemotherapy and surgical resection	Not reported
Kim et al, 2012 [11]	35	F	Asymptomatic	Not confirmed	Protruding mass at the antrum	Not available	Surgical resection	Negative
Rafailidis et al, 2009 [12]	68	M	Abdominal pain and palpable abdominal mass	Not confirmed	Ulcerated mass at the antrum	Exophytic large mass outgrowing from stomach body	Surgical resection and adjuvant chemotherapy	Positive
Song et al, 2016 [13]	55	M	UGIB (melena)	Not confirmed	Ulcerated mass at the stomach body	Not available	Surgical resection	Positive
Maxwell et al, 2016 [14]	63	F	Abdominal pain and symptomatic anemia	Confirmed	Large ulcerated mass at gastric antrum	Homogeneous circumferential mass involving the antrum	Surgical resection and adjuvant chemotherapy	Positive
Kumar et al, 2016 [15]	32	F	Abdominal pain	Not confirmed	Not available	11-cm exophytic mass at the lesser curvature	Surgical resection and adjuvant chemotherapy	Not reported

F: female; M: male; UGIB: upper gastrointestinal bleeding; CT: computed tomography.