Frequency of detection of multifocal disease, according to the number of quadrants sampled and whether there was invasive carcinoma or pure DCIS
| Method of detection of multifocal disease | Number of quadrants sampled | |||||
|---|---|---|---|---|---|---|
| Four quadrants | Less than four quadrants | |||||
| Invasive | DCIS | Total | Invasive | DCIS | Total | |
| DCIS, ductal carcinoma in situ. | ||||||
| Macroscopic examination | 20 | 0 | 20 | 2 | 0 | 2 |
| Microscopy of quadrant sections | 11 | 0 | 11 | 5 | 1 | 6 |
| Microscopy of nipple sections | 3 | 0 | 3 | 0 | 0 | 0 |
| Microscopy of nipple and quadrant sections | 1 | 0 | 1 | 0 | 0 | 0 |
| Microscopy of tumour sections (satellite foci near main lesion) | 4 | 0 | 4 | 0 | 0 | 0 |
| Total with multifocal disease | 39 | 0 | 39 | 7 | 1 | 8 |
| Total number of specimens | 186 | 34 | 220 | 20 | 8 | 28 |