NCCN Guidelines for Patients® | Melanoma

11 NCCN Guidelines for Patients ® : Melanoma, 2018 1  Melanoma basics How melanoma spreads Illustration Copyright © 2016 Nucleus Medical Media, All rights reserved. Illustration opyright 2017 ucleus edical edia, All rights reserved. Figure 4 Lymph nodes and vessels Lymph nodes and lymph vessels are found throughout the body. A lymph node is a small group of special disease-fighting cells. Lymph nodes are connected to each other by tiny tubes called lymph vessels. Figure 3 Melanocytes of the epidermis Melanocytes are located at the bottom of the epidermis. These cells make melanin, which spreads to the top of the epidermis and gives skin its color. Melanoma tumors are made of abnormal melanocytes that have become cancer cells. Melanocyte Derivative work of Anatomy: The Skin by Don Bliss available at: