Lymphatic Malformation 1, also known as milroy disease, is related to hereditary lymphedema i and hereditary lymphedema. An important gene associated with Lymphatic Malformation 1 is FLT4 (Fms Related Receptor Tyrosine Kinase 4), and among its related pathways/superpathways are Angiogenesis (CST) and Tyrosine Kinases / Adaptors. Affiliated tissues include skin and testis, and related phenotypes are lymphedema and hyperkeratosis