Table 1.
Characteristics of women diagnosed with ductal carcinoma in situ on preoperative biopsy and of their biopsies
| Characteristics | Number of women/biopsies | (%) |
|---|---|---|
| Calendar year of diagnosis | ||
| 2000–2004 | 75 | (12.4) |
| 2005–2009 | 200 | (33.0) |
| 2010–2014 | 331 | (54.6) |
| Age at diagnosis (years) | ||
| 20–49 | 196 | (32.3) |
| 50–59 | 247 | (40.8) |
| 60–69 | 119 | (19.6) |
| 70 + | 44 | (7.3) |
| Method of presentation | ||
| Screen-detecteda | 324 | (53.6) |
| Otherb | 280 | (46.4) |
| Unknown | 2 | – |
| Method of biopsy | ||
| Vacuum assisted biopsy (9G) | 237 | (65.1) |
| Core-needle biopsy (14G) | 127 | (34.9) |
| Unknown | 242 | – |
| Grade on preoperative biopsy | ||
| Low | 155 | (26.0) |
| Intermediate | 250 | (42.0) |
| High | 191 | (32.0) |
| Unknown | 10 | – |
| Type of curative surgery | ||
| BCS | 224 | (37.0) |
| BCS + SLNB | 96 | (15.8) |
| Mastectomy | 76 | (12.5) |
| Mastectomy + SLNB | 206 | (34.0) |
| Mastectomy + SLNB + AC | 4 | (0.7) |
| Total number of women/biopsies | 606 | (100) |
BCS breast conserving surgery, SLNB sentinel lymph node biopsy, AC axillary clearance
aIncluding 275 diagnosed through the breast screening programme and 49 diagnosed during follow-up for family history/genetic predisposition
bIncluding 143 diagnosed during follow-up for a previously treated breast lesion, 74 presenting symptomatically, and 63 referred for routine second opinion