Table 6 Assessment of accuracy of the initial ultrasound-guided diagnostic breast biopsy by 8-gauge vacuum-assisted biopsy technique versus spring-loaded 14-gauge core biopsy technique for all cases in which a subsequent surgical excision of tissue from the same anatomical site of the affected breast was performed in an immediate fashion.
| Â | 8-gauge | 14-gauge | All cases | P-value |
|---|---|---|---|---|
Cases in which a subsequent surgical excision of tissue from the affected breast was performed in an immediate fashion | 171 (23.6%) | 471 (65.5%) | 642 (44.5%) | <0.001 |
Histopathologic findings matched exactly for both the initial ultrasound-guided biopsy and the subsequent immediate surgical excision | 168 (98.2%) | 410 (87.0%) | 578 (90.0%) | <0.001 |
Mismatch observed in the type of benign diagnosis | 0 (0%) | 37 (7.9%) | 37 (5.8%) | <0.001 |
Misestimation of benign findings instead of invasive carcinoma | 0 (0%) | 7 (1.5%) | 7 (1.1%) | 0.199 |
Misestimation of benign findings instead of DCIS with microinvasive | 0 (0%) | 0 (0%) | 0 (0%) | --------- |
Misestimation of benign findings instead of DCIS | 0 (0%) | 0 (0%) | 0 (0%) | --------- |
Misestimation of high-risk breast lesions instead of invasive carcinoma | 0 (0%) | 0 (0%) | 0 (0%) | --------- |
Misestimation of high-risk breast lesions instead of DCIS with microinvasive | 0 (0%) | 0 (0%) | 0 (0%) | --------- |
Misestimation of high-risk breast lesions instead of DCIS | 0 (0%) | 1 (0.2%) | 1 (0.2%) | 1.0 |
Misestimation of DCIS instead of invasive carcinoma | 1 (0.6%) | 6 (1.3%) | 7 (1.1%) | 0.682 |
Misestimation of DCIS instead of DCIS with microinvasion | 2 (1.2%) | 0 (0%) | 2 (0.3%) | 0.071 |