The lymphatic drainage of the breasts is especially pertinent to oncology simply because breast most cancers is typical to your mammary gland, and cancer cells can metastasize (break away) from the tumor and become dispersed to other elements of your body via the lymphatic process. ...there is no medical purpose https://grok.com/share/c2hhcmQtMw%3D%3D_5ad6450c-533d-442c-a09c-9f7bce1babfb