Figure 5
From: Cystic mucinous adenocarcinoma of the lung: a case report
Histological features: a) Cyst lined by simple columnar mucinous epithelium. (Hematoxylin-Eosin 630x) b) Transition from benign to borderline epithelial lining, with nuclear atypias, multilayering and increased mitotic activity (arrow). (Hematoxylin-Eosin 630x).