FIGURE 1
From: Histopathologic Analysis of Atypical Lesions in Image-Guided Core Breast Biopsies

Histology of atypical lesions in NCBB. Top left, example of Group II ADH with micropapillary features in which there is circumferential involvement and detachment of cell clusters. Top right, another Group II lesion with cribriform-like architecture; however nuclei are small and partially overlapped. Bottom, Group IV lesions characterized by considerable nuclear atypism and complex architecture. A definitive diagnosis of DCIS is precluded by the focal nature of these changes in our NCBB series.