Invasive Mucinous Adenocarcinoma
Like other lung adenocarcinomas, invasive mucinous adenocarcinoma usually occur in the lung periphery. The image shows well-differentiated mucinous columnar cells in acinar and lepidic patterns. Grossly, invasive mucinous adenocarcinomas are poorly-circumscribed tumors with a gelatinous glaring surface. Due to widespread dissemination and multricentricity, some cases grossly create a pneumonia-like lobar consolidation.