Light micrograph of a liver lobule with steatosis (fatty liver). This condition leads to the accumulation of triglyceride fats (white spaces) in liver cells. The most common cause is heavy alcohol consumption, which disturbs normal fat metabolism. It can also be caused by toxins, diabetes and pregnancy. Steatosis is reversible by treating the underlying cause. Here, the periportal location of the fat clearly delimits the lobule contour. The central vein is also very conspicuous. Some inflammatory infiltrates can be seen in the portal tracts. Stained with haematoxylin and eosin.