sentinel lymph node References sentinel lymph node Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: breast cancer/ Diagnosis… generally begins in a so-called sentinel lymph node (the first lymph node invaded by cancer cells) and, in the case of breast cancer, spreads to axillary lymph nodes, which are located in and around the armpits. Read More… generally begins in a so-called sentinel lymph node (the first lymph node invaded by cancer cells) and, in the case of breast cancer, spreads to axillary lymph nodes, which are located in and around the armpits. Read More