Precursor Lesions for Sporadic Pancreatic Cancer: PanIN, IPMN, and MCN

Figure 4

(a) PanIN-2 lesion with moderate cytological atypia, retained nuclear polarity, and partially papillary architecture (H&E, 20x); (b) PanIN-3 lesion with severe cytological atypia, lost nuclear polarity, and papillary architecture (H&E, 40x).

(a)

(b)