Table 2 Patient characteristics
From: Schwannoma of the colon and rectum: a systematic literature review
| Characteristics | |
|---|---|
| Number | 95 |
| Age | 61.2 years, range 14–95, median 64 years |
| Sex | |
| Male | 40 (41.7%) |
| Female | 56 (58.3%) |
| Presenting symptom | |
| Asymptomatic | 27 (28.1%) |
| Rectal bleeding | 22 (22.9%) |
| Fecal occult blood | 8 (8.3%) |
| Abdominal pain | 15 (15.6%) |
| Constipation | 7 (7.3%) |
| Tenesmus | 7 (7.3%) |
| ↗ Abdominal girth | 2 (2.1%) |
| NA | 14 (14.6%) |
| Location | |
| Cecum and right colon | 29 (30.2%) |
| Transverse colon | 5 (5.2%) |
| Sigmoid | 27 (28.1%) |
| Left colon | 8 (8.3%) |
| Rectum | 21 (21.9%) |
| Appendix | 1 (1%) |
| NS | 5 (5.2%) |
| Colonoscopy | 73 (76%) |
| Smooth submucosal mass | 41 (56.2%) |
| Ulcerated submucosal mass | 5 (6.8%) |
| Submucosal polyp | 15 (20.5%) |
| Intraluminal mass | 6 (8.2%) |
| Polypoid | 3 (4.1%) |
| Others | 3 (4.1%) |
| Imaging | 46 (48%) |
| CT-SCAN | 35 (76%) |
| Well circumscribed | 13 (37.1%) |
| Homogenous enhancement | 12 (34.3%) |
| Central necrosis | 1 (1%) |
| EUS: hypo-echoic mass | 7 (7.3%) |
| FDG-PET | 4 (4.2%) |
| Hyper | 3 (3.1%) |
| Size (cm) | 3.78 cm, range 0.3–28, median 3 cm |
| Diagnosis | |
| Endoscopy | 23 (24%) |
| Post-surgery | 71 (74%) |
| Type of surgery | |
| Laparoscopic | 11 (11.5%) |
| Open | 58 (60.4%) |
| Endoscopic | 15 (15.6%) |
| Transanal | 7 (7.3%) |
| NA | 5 (5.2%) |
| Extent of surgery | |
| Classical segmental | 65 (67.7%) |
| Wedge | 3 (3.1%) |
| Endo-luminal | 23 (24%) |
| Tumor markers | |
| S100 | 94 (97.9%) |
| Vimentin | 13 (13.5%) |
| GFAP | 5 (5.2%) |
| CD-34 | 2 (2.1%) |
| CD-68 | 1 (1%) |
| Antonini type | 26 (27.1%) |
| A | 15 (57.7%) |
| B | 6 (23.1%) |
| A, B | 5 (19.2%) |
| Mitosis | |
| Ki-67% | 5 (5.2%) |
| MIB-1 | 6 (6.3%) |
| Low mitosis | 30 (31.3%), mean 2.1/50, median 1/50 |
| NA | 55 (57.3%) |
| LN | |
| NA | 85 (88.5%) |
| Negative | 11 (11.5%) |
| Aggressiveness | |
| Benign | 93 (96.9%) |
| Malignant | 3 (3.1%) |