Table 1. Baseline characteristics of 21 cases of the control and microcalcification groups.
| Case | age | Pathologic diagnosis | Assum-ed calcific-ation on PAI* | Confirmed calcification on specimen mammography | ||
| Existence | Number | Size* | ||||
| 1 | 25 | Fibroadenoma | No | No | - | - |
| 2 | 43 | Ductal carcinoma in situ | Yes | Yes | 10 | 500 (210–830) |
| 3 | 25 | Fibroadenoma | No | No | - | - |
| 4 | 24 | Fibroadenoma | No | No | - | - |
| 5 | 39 | Fibroadenoma | No | No | - | - |
| 6 | 31 | Fibrocystic change | Yes | Yes | 45 | 310 (190–940) |
| 7 | 41 | Fibroadenoma | No | No | - | - |
| 8 | 43 | Fibrocystic change | Yes | Yes | 17 | 130 (90–220) |
| 9 | 49 | Ductal carcinoma in situ | Yes | Yes | 16 | 160 (70–260) |
| 10 | 41 | Fibroadenoma | Yes | No | - | - |
| 11 | 42 | Fibrocystic change | Yes | Yes | 41 | 325 (160–390) |
| 12 | 47 | Ductal carcinoma in situ | Yes | Yes | 27 | 220 (110–250) |
| 13 | 24 | Fibroadenoma | No | No | - | - |
| 14 | 48 | Ductal carcinoma in situ | Yes | Yes | 14 | 280 (140–430) |
| 15 | 24 | Fibroadenoma | Yes | No | - | - |
| 16 | 29 | Fibroadenoma | No | No | - | - |
| 17 | 41 | Fibroadenoma | No | No | - | - |
| 18 | 46 | Columnar cell change | Yes | Yes | 1 | 230 |
| 19 | 59 | Sclerosing adenosis | Yes | Yes | 22 | 220 (80–760) |
| 20 | 39 | Fibrocystic change | No | Yes | 29 | 265 (120–390) |
| 21 | 74 | Ductal carcinoma in situ | Yes | Yes | 17 | 290 (110–1000) |
*Median value (range) of the diameter in calcifications (µm).
Abbreviations: PAI, photoacoustic Imaging.