Characteristics of study patients with Sessile Serrated Adenomas/Polyps (SSA/P) ≥20 mm
| Patient characteristics | |
|---|---|
| Patient factors | |
| Age, years (mean, SD) | 63.8 (12.3) Range (22–88 years) |
| Sex | |
| Male | 87 (42.0%) |
| Female | 120 (58.0%) |
| ASA (n, %) | |
| ASA 1 | 114 (55.1%) |
| ASA 2 | 73 (35.3%) |
| ASA 3 | 16 (7.7%) |
| ASA 4 | 3 (1.4%) |
| Not recorded | 1 (0.5%) |
| Lesion and procedure factors | |
| Lesion size, mm. mean, (SD) | 29.2 (9.9) Range (20–80 mm) |
| Lesion location (n, %) | |
| Rectum <5 cm | 3 (1.4%) |
| Rectum >5 cm | 3 (1.4%) |
| Sigmoid | 8 (3.9%) |
| Descending colon | 7 (3.4%) |
| Splenic flexure | 8 (3.9%) |
| Distal transverse | 8 (3.9%) |
| Mid transverse | 15 (7.2%) |
| Proximal transverse | 11 (5.3%) |
| Hepatic flexure | 27 (13.0%) |
| Ascending colon | 74 (35.7%) |
| Caecum | 37 (17.9%) |
| Caecum ICV involved | 4 (1.9%) |
| Caecum appendiceal orifice involved | 2 (1.0%) |
| Lesion location (n, %) | |
| Rectum to descending colon (distal colon) | 21 (10.1%) |
| Splenic flexure to cecum (proximal colon) | 186 (89.9%) |
| Paris classification (n, %) | |
| 0-Is | 21 (10.1%) |
| 0-IIa | 154 (74.4%) |
| 0-IIb | 13 (6.3%) |
| 0-IIa+Is | 16 (7.7%) |
| Other | 3 (1.4%) |
| Histology | |
| Majority polyp histology (n, %) | |
| Sessile serrated adenoma/polyp | |
| SSA/P-ND | 140 (67.6%) |
| SSA/P-D | 67 (32.4%) |
| SSA/P-D—conventional dysplasia | 36 (53.7%) |
| SSA/P-D—serrated dysplasia | 31 (46.3%) |
| Submucosal invasive cancer | 8 (3.9%) |
ASA, American Society of Anaesthesiologists; ICV, lleo-caecal valve; SSA/P-D, sessile serrated adenomas/polyps with cytological dysplasia; SSA/P-ND, sessile serrated adenomas/polyps without cytological dysplasia.