Table 3.
BI-RADS category and positive predictive values of breast lesions according to indications of ultrasonographic-guided VABB
| Variable | BI-RADS category |
PPV (%) a) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1,2 | 3 | 4a | 4b | 4c | 5 | |||||||||
| Palpable lesions (n=1,296) | 6 | 1,259 | 27 | 4 | 0 | 0 | 6.6 (2/31) | |||||||
| Low-suspicion lesions (n=458) | 0 | 0 | 444 | 14 | 0 | 0 | 1 (5/458) | |||||||
| High-risk lesions (n=363) | 1 | 100 | 238 | 13 | 9 | 2 | 3 (7/262) | |||||||
| Calcifications (n=302) | 0 | 31 | 164 | 41 | 44 | 22 | 41 (111/271) | |||||||
| Patient's desire (n=216) | 9 | 207 | 0 | 0 | 0 | 0 | 0 (0/0) | |||||||
| Complex and intraductal lesions (n=112) | 2 | 48 | 57 | 3 | 2 | 0 | 3 (2/62) | |||||||
| Discordant benign lesions (n=79) | 0 | 0 | 8 | 42 | 16 | 13 | 12.7 (10/79) | |||||||
| Non-mass lesions (n=65) | 1 | 19 | 29 | 10 | 3 | 3 | 24 (11/45) | |||||||
| Growing lesions (n=29) | 0 | 19 | 10 | 0 | 0 | 0 | 0 (0/10) | |||||||
| Total (n=2,920) | 19 | 1,691 | 1,011 | 99 | 73 | 27 | 12.2 (148/1,210) | |||||||
BI-RADS, Breast Imaging-Reporting and Data System; VABB, vacuum-assisted breast biopsy; PPV, positive predictive value.
a)
The number of breast lesions diagnosed as malignant (invasive cancer or ductal carcinoma in situ) with VABB divided by the number of lesions belonging to ultrasonographic-BI-RADS categories 4 and 5.