Table 5 Characteristics of serrated polyps
From: Validation of serrated polyps (SPs) in Swedish pathology registers
Variable | HP | TSA | SSA/P | U | F | Total | |||
|---|---|---|---|---|---|---|---|---|---|
SSA/P | SA | Mixed | Total | ||||||
Individuals | 34 (32%) | 3 (3%) | 8 (3%) | 51 (48%) | 12 (11%) | 70 (66%) | 3 (3%) | 5 (5%) | 106 (100%) |
Number of polyps* | |||||||||
 0 | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 2 (40%) | 2 (2%) |
 1 | 8 (24%) | 2 (67%) | 4 (50%) | 24 (47%) | 5 (42%) | 33 (47%) | 0 (0%) | 1 (20%) | 44 (42%) |
 2–3 | 11 (32%) | 1 (33%) | 2 (25%) | 15 (29%) | 4 (33%) | 21 (30%) | 1 (33%) | 2 (40%) | 33 (31%) |
  ≥ 4 | 15 (44%) | 0 (0%) | 2 (25%) | 12 (24%) | 3 (25%) | 16 (23%) | 2 (67%) | 0 (0%) | 27 (25%) |
Simultaneous findings | |||||||||
 Conventional adenoma | 15 (44%) | 0 (0%) | 0 (0%) | 17 (33%) | 5 (42%) | 22 (31%) | 0 (0%) | 1 (20%) | 33 (31%) |
 CRC | 1 (3%) | 0 (0%) | 3 (38%) | 5 (10%) | 1 (8%) | 8 (11%) | 1 (33%) | 0 (0%) | 10 (9%) |
POLYPS | 61 (39%) | 3 (2%) | 11 (7%) | 56 (36%) | 13 (8%) | 80 (52%) | 8 (5%) | 3 (2%) | 155 (100%) |
Size | |||||||||
  < 10 | 26 (43%) | 0 (0%) | 5 (45%) | 24 (43%) | 2 (15%) | 31 (39%) | 0 (0%) | 1 (33%) | 58 (37%) |
  ≥ 10 | 4 (7%) | 3 (100%) | 5 (45%) | 16 (29%) | 7 (54%) | 28 (35%) | 2 (25%) | 0 (0%) | 37 (24%) |
 Unspecified | 31 (51%) | 0 (0%) | 1 (9%) | 16 (29%) | 4 (31%) | 21 (26%) | 6 (75%) | 2 (67%) | 60 (39%) |
Location | |||||||||
 Proximal | 25 (41%) | 0 (0%) | 9 (82%) | 23 (41%) | 7 (54%) | 39 (49%) | 7 (88%) | 0 (0%) | 71 (46%) |
 Distal | 25 (41%) | 1 (33%) | 2 (18%) | 8 (14%) | 5 (38%) | 15 (19%) | 1 (13%) | 2 (67%) | 44 (28%) |
 Rectal | 11 (18%) | 2 (67%) | 0 (0%) | 25 (45%) | 1 (8%) | 26 (33%) | 0 (%) | 1 (33%) | 40 (26%) |
 Unspecified | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) |
Dysplasia | |||||||||
 None | 16 (26%) | 0 (0%) | 2 (18%) | 3 (5%) | 0 (0%) | 5 (6%) | 5 (63%) | 0 (0%) | 26 (17%) |
 Low | 2 (3%) | 3 (100%) | 4 (36%) | 45 (80%) | 12 (92%) | 61 (76%) | 1 (13%) | 3 (100%) | 70 (45%) |
 High | 0 (0%) | 0 (0%) | 1 (9%) | 3 (5%) | 1 (8%) | 5 (6%) | 0 (0%) | 0 (0%) | 5 (3%) |
 Unspecified | 43 (70%) | 0 (0%) | 4 (36%) | 5 (9%) | 0 (0%) | 9 (11%) | 2 (25%) | 0 (0%) | 54 (35%) |