Table 4.

Final diagnoses in four patients with equivocal (B3) histology and subsequent malignant pathology

Reasons for B3 category	Final diagnosis
Atypical intraductal epithelial proliferation (×2)	(1) Widespread ADH/low grade micropapillary DCIS
	(2) ADH/DCIS with multifocal invasive carcinoma
Suggestive of radial scar	Radial scar with DCIS
Atypical epithelium with granulomatous inflammation	6 mm invasive ductal carcinoma, grade 3

ADH, atypical ductal hyperplasia; DCIS, ductal carcinoma in situ.