Table 2.
The prevalence of incidental and non-incidental papillary thyroid microcarcinoma (IPTMC and NIPTMC) according to all thyroid tumors and all thyroid cancers in years 2008–2016
| 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | |
|---|---|---|---|---|---|---|---|---|---|
| For all thyroid tumors | |||||||||
| IPTMC | 5 (1.03%) | 3 (0.79%) | 3 (0.71%) | 4 (0.83%) | 9 (1.66%) | 7 (1.24%) | 4 (1.06%) | 6 (1.01%) | 11 (2.31%) |
| NIPTMC | 4 (0.83%) | 10 (2.62%) | 9 (2.13%) | 5 (1.04%) | 9 (1.66%) | 9 (1.59%) | 6 (1.60%) | 25 (4.21%) | 27 (5.66%) |
| PTMC | 9 (1.86%) | 13 (3.40%) | 12 (2.84%) | 9 (1.86%) | 18 (3.31%) | 16 (2.83%) | 10 (2.66%) | 31 (5.22%) | 38 (7.97%) |
| All thyroid cancers | 24 (4.96%) | 26 (6.81%) | 36 (8.51%) | 29 (6.00%) | 51 (9.39%) | 53 (9.38%) | 32 (8.51%) | 62 (10.44%) | 80 (16.77%) |
| All thyroid tumors | 484 (100%) | 382 (100%) | 423 (100%) | 483 (100%) | 543 (100%) | 565 (100%) | 376 (100%) | 594 (100%) | 477 (100%) |
| For all thyroid cancers | |||||||||
| IPTMC | 5 (20.83%) | 3 (11.53%) | 3 (8.33%) | 4 (13.79%) | 9 (17.64%) | 7 (13.20%) | 4 (12.5%) | 6 (9.67%) | 11 (13.75%) |
| NIPTMC | 4 (16.66%) | 10 (38.46%) | 9 (25%) | 5 (17.24%) | 9 (17.64%) | 9 (16.98%) | 6 (18.75%) | 25 (40.32%) | 27 (33.75%) |
| PTMC | 9 (37.5%) | 13 (50%) | 12 (33.33%) | 9 (31.03%) | 18 (35.29%) | 16 (30.18%) | 10 (31.25%) | 31 (50%) | 38 (47.5%) |
| All thyroid cancers | 24 (100%) | 26 (100%) | 36 (100%) | 29 (100%) | 51 (100%) | 53 (100%) | 32 (100%) | 62 (100%) | 80 (100%) |
IPTMC incidental papillary thyroid microcarcinoma, NIPTMC non-incidental papillary thyroid microcarcinoma, PTMC papillary thyroid microcarcinoma