LVI stands for lymphovascular invasion. Lymphovascular invasion is the movement of cancer cells into either a blood or lymphatic vessel. Lymphovascular invasion allows cancer cells to spread to lymph nodes or other parts of the body.
Blood vessels carry blood to and from organs. Lymphatic vessels bring excess fluid, waste, and other substances away from organs so they can be examined by the immune system before being removed from the body. Lymphatic vessels connect with small immune organs called lymph nodes.