Metastatic Carcinoma Lymph Node

Carcinomas will often invade the lymphatic system and colonize in the local lymph nodes. Initially, the cancerous cells will appear as collections of epithelial cells in the lymph node but over time they will resemble the tissue or organ from which they derived. In this image metastatic adenocarcinoma from the breast, note the extensive glandular tissue that is similar to glands of the breast.