A and B, Craniocaudal (A) and mediolateral oblique (B) mammograms show spiculated mass (arrow) with associated calcifications, skin retraction, and skin thickening at 8-o'clock position in right breast, highly suspicious for cancer. Note second lobulated mass more superiorly at 10-o'clock position, which was indeterminate for malignancy.

A and B, Craniocaudal (A) and mediolateral oblique (B) mammograms show spiculated mass (arrow) with associated calcifications, skin retraction, and skin thickening at 8-o'clock position in right breast, highly suspicious for cancer. Note second lobulated mass more superiorly at 10-o'clock position, which was indeterminate for malignancy.

C, Sonogram shows spiculated mass seen in A and B. Initial 14-gauge core needle biopsy revealed infiltrating ductal carcinoma, which was confirmed at excision.

D, Sonogram shows lobulated mass (cursors) seen in A and B. Infiltrating and intraductal carcinoma were documented by both 14-gauge core needle breast biopsy and mastectomy. No bleeding or hematoma occurred at initial biopsy performed while patient continued anticoagulation therapy. No hematoma occurred at mastectomy 6 weeks later.

A, 17-mm hematoma (arrow) documented on digital spot mammographic imaging after 11-gauge stereotactic biopsy in patient undergoing anticoagulation therapy with warfarin. Minimal air is seen within hematoma.

B, Digital spot mammogram shows 12-mm hematoma and minimal air (arrowheads) after 11-gauge stereotactic biopsy in patient not known to be anticoagulated. Both biopsies yielded fibrocystic changes with microcalcifications.