Hereditary Lymphedema, also known as milroy disease, is related to lymphatic malformation 1 and lymphatic malformation 5. An important gene associated with Hereditary Lymphedema is CELSR1 (Cadherin EGF LAG Seven-Pass G-Type Receptor 1), and among its related pathways/superpathways are PI3K-Akt signaling pathway and Signaling by Receptor Tyrosine Kinases. Affiliated tissues include endothelial and breast, and related phenotypes are homeostasis/metabolism and immune system