Embryology The liver develops at 3 to 4 weeks’ gestation as an outgrowing diverticulum of proliferating endodermal cells from the ventral wall of the foregut in response to signals from the adjacent developing heart ( Fig. 71.1 ). In the…
Mucinous Epithelial Tumors The classification of appendiceal epithelial tumors is shown in Box 28.1 . The classification, nomenclature, and histological criteria of mucinous epithelial tumors in the appendix have been the source of considerable controversy. In particular, mucinous epithelial tumors…
Introduction Given the plethora of drugs available by prescription and over the counter, and that most are administered orally, it is not surprising that many drugs can cause gastrointestinal (GI) disease. The injury caused by drugs can be due to…
The liver is the target of many infectious agents, most notably hepatotropic viruses such as hepatitis B virus (HBV) and hepatitis C virus (HCV). In addition, many infectious organisms can involve the liver in the setting of disseminated infection, in…