Table 1.
Clinicopathologic features of protruded-type adenomas and laterally spreading tumors
| PAs (n=54) | LSTs (n=50) | |
|---|---|---|
| Age (year) mean ± SD (range)a | 47.4 ± 14.4 (25–75) | 63.4 ± 9.7 (45–77) |
| Male/femaled | 35/19 | 30/20 |
| Tumor size (mm) mean ± SD (range)b | 14.6 ± 9.0 (3–30) | 27.0 ± 17.1 (10–75) |
| Location | ||
| Proximal colonc | 10 (18.5%) | 24 (48.0%) |
| Distal colona | 31 (57.4%) | 8 (16.0%) |
| Rectumd | 13 (24.1%) | 18 (36.0%) |
| Tumor histologyd | ||
| Tubular | 19 (35.2%) | 17 (34.0%) |
| Tubulovillous | 15 (27.8%) | 22 (44.0%) |
| Villotubular | 20 (37.0%) | 11 (22.0%) |
| Grade of intraepithelial neoplasiad | ||
| Low grade | 37 (68.5%) | 29 (58.0%) |
| High grade | 17 (31.5%) | 21 (42.0%) |
a
p<0.001.
b
p<0.01.
c
p<0.005.
d
No significant difference between PAs and LSTs.
LST, laterally spreading tumor; PA, protruded-type adenoma. Proximal colon includes cecum, ascending colon, and transverse colon; distal colon includes descending colon and sigmoid colon.