Table 1. . Patient cohort.

Patients for analysis (n)	Study (year)	Age (years)	Sex	Presentation	One-year survival	Follow-up (months)	Endoscopic appearance	Ref.
1	Kouvaras et al. (2019)	82	Female	Melena	Yes	12	Pigmented polypoid masses	[7]
2	Jelincic et al. (2005)	58	Male	Fatigue, epigastric pain, weight loss	Yes	24	Gastritis and 2-cm ulcer	[8]
3	Holmes et al. (2017)	54	Male	Weakness, abdominal pain, weight loss	Yes	36	Ulcerated brown tumor	[9]
4	Zhou et al. (2016)	68	Female	Incidental	Yes	24	Round mass in greater curvature of the stomach	[10]
5	Bahat et al. (2010)	59	Male	Incidental	No	4	Polypoidal	[11]
6	Bolzacchini et al. (2016)	72	Male	Epigastric pain, melena	No	6	Ulcerated antral mass	[12]
7	Laskaratos et al. (2014)	73	Male	Incidental	No	12	Pigmented, elevated lesion 2 cm in the posterior wall of the stomach	[13]
8	Fotoohi et al. (2019)	65	Male	Dysphagia, weight loss,	No	3	Bulky black mass at oesophageal gastric junction	[14]
9	Houissa et al. (2010)	56	Male	Epigastric pain, hematemesis, weight loss	Yes	84	Ulcerated tumor in the proximal stomach	[15]
10	Lufrano et al. (2007)	67	Female	Chest tightness/pain	Yes	60	Not described	[16]
11	Yang et al. (2008)	53	Male	Epigastric pain and dysphagia	No	11	Dark pigmented lesion at the gastric junction	[17]
12	Noraidah et al. (2003)	76	Male	Fatigue, exertional dyspnea	No	NA†	Large ulcerated lesion	[18]
13	Loh et al. (2012)	68	Male	Incidental	No	4	Not described	[19]
14	Khaliq et al. (2012)	78	Male	Asymptomatic	Yes	24	Ulcerated fundic lesion	[20]
15	Kim et al. (2013)	60	Male	Fatigue	No	NA	Black polypoid mass	[21]
16	Konikoff et al. (2019)	74	Male	Epigastric pain, hematemesis, melena	No	NA	Large ulcer in lesser curvature with adherent blood clot. 3–4 adjacent nodules noted	[22]
17	Wang et al. (2016)	63	Male	Right limb disorder	No	10	Huge ulcer lump (5.0 × 4.0 cm2) at the bottom of stomach, with purplish-brown mucosa	[23]
18	Alazmi et al. (2003)	66	Female	Anemia and weight loss	Yes	18	Not described	[24]
19	Cho et al. (2014)	64	Male	Fatigue	Yes	18	Ulcerated mass in the greater curvature	[25]
20	Yamamura et al. (2012)	58	Male	Fatigue, epigastric pain	Yes	16	Submucosal mass with ulceration at antrum	[26]
21	Dabrowski et al. (2005)	63	Male	Progressive dysphagia	Yes	14	Friable tumor extending to the cardia	[27]
22	Wang et al. (2019)	66	Female	Abdominal pain	Yes	NA	Not described	[28]
23	Callaghan et al. (2018)	67	Male	Left chest discomfort	Yes	20	Ulcerated tumor in the proximal stomach	[29]
24	Lim et al. (2018)	50	Male	Epigastric pain, reduced appetite	No	NA	Ulcerated mass extending toward antrum	[30]
25	Castro et al. (2008)	50	Female	Axillary lymphadenopathy	No	NA	Elevated lesion with central umbilication and black hue in the fundus	[31]
26	Wiewiora et al. (2019)	54	Male	Anorexia, weight loss	No	3	Not described	[32]
27	Augustyn et al. (2015)	75	Male	Melena	No	11	Pigmented, ulcerated lesion with irregular margins	[33]
28	Lagoudianakis et al. (2006)	42	Male	Abdominal pain, anorexia, vomiting	No	2	Upper gastrointestinal endoscopy, multiple dark brown macules (2–5 mm in diameter) were seen within the stomach	[34]
29	Liu et al. (2019)	59	Male	Postprandial pain and tarry stool for 2 months	No	6	Polypoid mass in the cardia of the stomach	[35]
30	Phillips et al. (2018)	87	Male	Fatigue, weight loss, melena	No	NA	8-cm pedunculated mass at the greater curvature	[41]
31	Eshtiaghpour et al. (2014)	63	Female	Abdominal pain	No	NA	Black lesions in the greater curvature of the stomach	[36]
32	Liang et al. (1995)	78	Female	Abdominal pain, loss of appetite, weight loss, anemia	No	1	12 small darkly pigmented tumors. Some lesions were raised and volcanoid, some were flat	[37]
33	Slater et al. (2014)	63	Female	Intermittent vomiting	No	NA	5-mm polyps in the body	[38]
34	Song et al. (2014)	50	Female	Epigastric discomfort, vomiting	No	4	Friable mass at lesser curvature	[39]

^†Where the follow up was not published in original article it is listed as not available (NA).