Table 1.
Grade distribution by detection mode and sample size compared to previous studies on DCIS grade distribution
| Screen detected | Symptomatic | Not specified | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DCIS grade 1 | DCIS grade 2 | DCIS grade 3 | DCIS grade 1 | DCIS grade 2 | DCIS grade 3 | DCIS grade 1 | DCIS grade 2 | DCIS grade 3 | ||||
| % | % | % | N | % | % | % | N | % | % | % | N | |
| This study | 16 | 32 | 52 | 1430 | 19 | 28 | 54 | 263 | ||||
| Evans 2001 [6] | 13 | 18 | 69 | 222 | 16 | 23 | 61 | 151 | - | - | - | - |
| Kessar 2002 [15] | 23 | 23 | 54 | 98 | 19 | 19 | 62 | 52 | - | - | - | - |
| Meijnen 2005 [16] | 22 | 31 | 47 | 87 | 26 | 24 | 49 | 293 | - | - | - | - |
| de Roos 2007 [14] | 7 | 44 | 53 | 54 | 30 | 45 | 25 | 20 | - | - | - | - |
| Sorum 2010 [18] | - | - | - | - | - | - | - | - | 23 | 23 | 53 | 2403 |
| Bluekens 2012 [19] | 15 | 32 | 54 | 853 | - | - | - | - | - | - | - | - |
| Weigel 2015 [33] | 18 | 39 | 42 | 898 | - | - | - | - | - | - | - | - |
DCIS ductal carcinoma in situ