mouse pancreatic tumors (IMAGE) Cold Spring Harbor Laboratory Caption Mouse pancreatic tumors have extensive cell heterogeneity, as seen in these cross-sections. The early-stage pancreatic cancer cells (green and red) on the left have a more structured, organized shape. As they transform into a deadlier, drug-resistant variety of cancer cells, they lose that structure, as seen on the right. Credit Tuveson lab/Cold Spring Harbor Laboratory Usage Restrictions Attribution required License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.