The distinction between lobular and ductal lesions of the breast is important in several
circumstances. Diagnostic reproducibility of lobular versus ductal lesions, based on
histology alone, is less than optimal. The proper distinction between atypical lobular
hyperplasia, lobular carcinoma in situ and low-grade ductal carcinoma in situ is critical for
patient management. Patients who have a core biopsy of invasive lobular carcinoma often
have preoperative magnetic resonance imaging to prepare the surgeon for proper margin …