Primary Lymphedema, also known as lymphedema primary, is related to yellow nail syndrome and lymphatic malformation 1. An important gene associated with Primary Lymphedema is FLT4 (Fms Related Receptor Tyrosine Kinase 4), and among its related pathways/superpathways are ERK Signaling and TGF-Beta Pathway. The drugs Propranolol and Vasodilator Agents have been mentioned in the context of this disorder. Affiliated tissues include skin and lymph node, and related phenotypes are homeostasis/metabolism and normal