Skip to main content

Table 1 Descriptive statistics of the lesions included in the study

From: Clinical application of ultrasound-guided percutaneous microwave ablation for benign breast lesions: a prospective study

Variable Descriptive statisticsa
Pathologyb
 Adenosis 220 (55.4%)
 Fibroadenoma 160 (40.3%)
 Intraductal papilloma 9 (2.3%)
 Other 8 (2.0%)
Position
 Upper Outer Quadrant 294 (40.6%)
 Upper Inner Quadrant 206 (28.4%)
 Lower Inner Quadrant 92 (12.7%)
 Lower Outer Quadrant 133 (18.3%)
 Distance to skin 7.0 (4.0–10.0)
 Distance to pectoralis muscle 4.0 (1.5–8.0)
Ablation power (W)
 20.0 4 (0.6%)
 30.0 701 (96.7%)
 40.0 18 (2.5%)
 50.0 2 (0.3%)
 Ablation energy (J) 1590.0 (900.0–2970.0)
 Unit energy 10.14 (5.70–18.43)
Complications
 No 718 (99.0%)
 Pricking 1 (0.1%)
 Skin scalding 1 (0.1%)
 Local erythema and swelling 2 (0.3%)
 Fat liquefaction 3 (0.4%)
  1. aQualitative variables are summarized as frequency (percent) and quantitative variables are summarized as median (25th percentile – 75th percentile)
  2. bPathology was only recorded for 397 lesions while the other variables were recorded for all the 725 lesions