Editing Breast (section)

===Lymphatic drainage===
Approximately 75% of the [[lymph]] from the breast travels to the axillary [[lymph node]]s on the same side of the body, while 25% of the lymph travels to the parasternal nodes (beside the sternum bone).<ref name=GRAYS2005 />{{rp|116}} A small amount of remaining lymph travels to the other breast and to the abdominal lymph nodes. The subareolar region has a lymphatic plexus known as the "subareolar plexus of Sappey".<ref name="Pacifici">{{cite web |last1=Pacifici |first1=Stefano |title=Sappey plexus {{!}} Radiology Reference Article {{!}} Radiopaedia.org |url=https://radiopaedia.org/articles/sappey-plexus-1?lang=gb |website=Radiopaedia |date=11 October 2011 |access-date=25 August 2020 |archive-date=2 May 2021 |archive-url=https://web.archive.org/web/20210502224454/https://radiopaedia.org/articles/sappey-plexus-1?lang=gb |url-status=live }}</ref> The [[axillary lymph node]]s include the pectoral (chest), subscapular (under the scapula), and humeral (humerus-bone area) lymph-node groups, which drain to the central [[axillary lymph nodes]] and to the apical axillary lymph nodes. The lymphatic drainage of the breasts is especially relevant to [[oncology]] because breast cancer is common to the mammary gland, and cancer cells can [[Metastasis|metastasize]] (break away) from a [[tumor]] and be dispersed to other parts of the body by means of the lymphatic system.