| Site of GI involvement | Clinical presentation/clinical symptoms | N. (%) | Treatment | References |
| Oropharynx | Oropharyngeal dysphagia | 1 | n.r. | [2] | | Tongue lesion | 1 | n.r. | [7] |
| Total oropharynx | | 2 (1%) | | |
| Esophagus | Stricture | 20 | Dil., surg., ET | [2, 8–23] | | Achalasia | 3 | Surg., ET | [2, 24, 25] | | Nonspecific dysmotility | 1 | n.r. | [26] |
| Total esophagus | | 24 (12%) | | |
| Stomach | Linitis plastica | 57 | Surg., CT, ET, RT | [2, 27–38] | | Obstruction/stenosis | 27 | Surg., CT | [1, 2, 27, 28, 39] | | Polyp | 2 | CT, ET, RT | [40, 41] | | Ulcer erosion/bleeding | 12 | CT, ET, RT, Surg. | [27, 28, 41–44] | | Perforation | 2 | Surg., CT, ET | [27, 45] | | Pain | 10 | CT, ET | [27, 46] | | Dyspepsia | 11 | n.r. | [27, 46] | | n.r. | 1 | n.r. | [47] | | n.r. | 3 | Surg., CT, ET | [48] |
| Total stomach | | 125 (60%) | | |
| Small intestine | Obstruction/stenosis | 12 | Pall. care, surg., ET, RT, CT | [2, 49–57] | | Multiple obstructions | 1 | n.r. | [2] | | Peritonitis | 1 | Surg. | [58] | | Bleeding | 1 | Surg. | [59] | | n.r. | 1 | n.r. | [60] |
| Total small intestine | | 16 (8%) | | |
| Colon | Obstruction/stenosis | 16 | ET, CT, RT, Surg. | [54, 61–69] | | Asymptomatic abdominal mass | 1 | Surg. | [1] | | Multiple strictures/diffuse infiltration | 2 | n.r. | [2, 70] | | Polyp | 2 | Surg., ET | [53, 71] | | Linitis plastica | 1 | Surg. | [72] | | n.r. | 1 | n.r. | [47] |
| Total colon | | 23 (11%) | | |
| Rectum | Obstruction/stenosis | 11 | CT, RT, ET, Surg. | [56, 61, 73–77] | | Linitis plastica | 1 | n.r. | [33] | | Abdominal pain | 1 | CT | [39] | | Rectal bleeding | 1 | n.r. | [46] |
| Total rectum | | 14 (7%) | | |
| Anum | Polyp | 1 | RT, ET | [78] | | n.r. | 1 | n.r. | [79] |
| Total anum | | 2 (1%) | | |
| Total | | 206 | | |
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