Table 2 Procedural and histopathology variables for the ultrasound-guided 8-gauge Mammotome® biopsy technique: For all cases (n = 304), for cases in which an attempt to completely excise the breast lesion was made (n = 235), and for cases in which only diagnostic tissue sampling of the breast lesion was undertaken (n = 69)
All cases (n = 304) | Attempted lesion excision (n = 235) | Only diagnostic lesion sampling (n = 69) | P-value | |
|---|---|---|---|---|
Estimated number of Mammotome® cores removed | 8 (2–38) | 9 (3–38) | 6 (2–17) | < 0.001 |
Estimated volume of Mammotome® cores removed (cubic cm) | 2.18 (0.26–37.13) | 2.50 (0.60–37.13) | 1.38 (0.26–4.38) | < 0.001 |
Percentage of estimated volume of Mammotome® cores removed as compared to volume of original ultrasound lesion | 615% (9%–18,086%) | 730% (113%–18,086%) | 222% (9%–2263%) | < 0.001 |
Lesion histopathology | < 0.001 | |||
Fibroadenoma | 126 (41%) | 112 (48%) | 14 (20%) | |
Other benign findings | 107 (35%) | 88 (37%) | 19 (28%) | |
Benign tumors | 10 (3%) | 7 (3%) | 3 (4%) | |
Invasive breast cancer | 47 (16%) | 20 (9%) | 27 (39%) | |
DCIS | 4 (1%) | 2 (1%) | 2 (3%) | |
ICPC | 2 (1%) | 1 (< 0.5%) | 1 (1%) | |
Lymphoma | 3 (1%) | 1 (< 0.5%) | 2 (3%) | |
SQBCC | 1 (< 0.5%) | 0 (0%) | 1 (1%) | |
Epithelial atypia | 4 (1%) | 4 (2%) | 0 (0%) | |
Post-procedural complications (hematoma formation, skin ecchymosis, or both) | 24 (8%) | 20 (9%) | 4 (6%) | 0.462 |