Table 2. Polyp characteristics at CT Colonography.
| Characteristic | SSA/P(n=137 polyps) | TSA(n=16 polyps) | HP(n=219 polyps) | Advanced Adenomas**(n=395 polyps) |
|---|---|---|---|---|
| Size | ||||
| Average (± STD) | 10.6 ±5.1 | 14.1 ±11.1 | 7.2 ±1.7 | 14.6 ± 8.9 |
| Large (No. ≥ 10 mm) | 70 | 8 | 19 | 350 |
| Small (No. 6-9 mm) | 67 | 8 | 200 | 45 |
| Location | ||||
| Prox. colon (C/A/T)* | 125 (21/79/25) | 4 (0/2/2 ] | 19 (7/2/10) | 181 (55/84/42) |
| Dist. colon (D/S/R)* | 12 (4/6/2) | 12 (1/6/5) | 200 (16/129/55) | 214 (32/115/67) |
| Morphology | ||||
| Sessile | 62 | 9 | 139 | 164 |
| Flat | 54 | 3 | 41 | 47 |
| Pedunculated | 13 | 3 | 22 | 162 |
| Carpet | 2 | 1 | 0 | 9 |
| Other | 6 | 0 | 17 | 13 |
| Histology | ||||
| High Grade Dysplasia | 0 | 1 | 0 | 22 |
*
Proximal colon includes cecum (C), ascending(A), transverse (T). Distal colon includes descending (D), sigmoid (S), rectum (R)
**
n=171 with villous component.