Hereditary Lymphedema Ia, also known as lmph1a, is related to lymphatic malformation 1 and lymphatic malformation 5. An important gene associated with Hereditary Lymphedema Ia is GJC2 (Gap Junction Protein Gamma 2), and among its related pathways/superpathways is MAPK Signaling: Mitogens. Related phenotypes are normal and mortality/aging