APPENDIX I.

Characteristics of Participants and Their Index Cancers

Age

Median, 61 years

Range, 36–91 years

Bra cup size

A (n = 0)

B (n = 8)

C (n = 7)

D (n = 2)

Breast composition

Fatty (n = 3)

Scattered (n = 9)

Heterogeneously dense (n = 8)

Extremely dense (n = 0)

Large-core needle biopsy device

14-gauge spring loaded (n = 11)

12-gauge spring loaded (n = 7)

12-gauge vacuum assisted (n = 1)

10-gauge vacuum assisted (n = 2)

Median tumor diameter

Mammography, 10 mm

Ultrasound, 9 mm

Contrast-enhanced MRI, 11 mm

Histology

Invasive ductal carcinoma (n = 10)

Invasive ductal carcinoma and up to 25% ductal carcinoma in situ (n = 10)

Estrogen receptor (ER), progesterone receptor (PR), and ERBB2 (formerly HER2/neu) status

ER+, PR+, ERBB2− (n = 17)

ER+, PR−, ERBB2− (n = 2)

ER+, PR+, ERBB2+ (n = 1)