What do the terms benign, malignant, histogenesis, differentiation, stage and grade mean when applied to cancer? Whats the difference between an adenoma and an an adenocarcinoma? What's the adenoma - carcinoma sequence? Without understanding these basics you'll quickly get lost when learning about cancer and treatments for cancer. All is explained in this podcast, in which Jon Lund talks to David Semeraro using examples and pictures of macroscopic and microscopic cancers including adenocarcinomas, BCCs and SCCs.