|
|
|
![]() Other Issues: |
|
||||||||
Cover A mouse model of pancreatic ductal adenocarcinoma that recapitulates the genetics and pathology of the human disease. Shown here is a hematoxylin and eosin-stained photomicrograph of a pancreatic adenocarcinoma occurring in a 10-wk-old mouse with pancreas-specific activation of oncogenic Kras and homozygous deletion of the Ink4a/Arf tumor suppressor locus. This tumor (lower-left half of image) has invaded through the intestinal muscle wall (highlighted circle) and into the adjacent intestinal epithelium (upper right). The inset panels depict the age-dependent onset and progression of these malignancies:The mice first develop multifocal low-grade pancreatic intraepithelial neoplasia (PanIN, left). These lesions progress to higher-grade PanIN structures (middle) and eventually to invasive and metastatic cancers (right ). (For details, see Aguirre et al., p. 3112, and the related paper by Lewis et al., p. 3127.)