primary lymphedema CELSR1-related late-onset primary lymphedema https://www.malacards.org/card/celsr1_related_late_onset_primary_lymphedema Orphanet:569816 MONDO:0035499 A rare genetic primary lymphedema characterized by unilateral or bilateral lower limb lymphedema of variable severity. The condition shows almost complete penetrance with onset in childhood or adolescence in females, whereas in males it shows incomplete penetrance with later onset of disease. Lymphoscintigraphy in more severely affected individuals reveals lymphatic abnormalities consistent with lymphangiectasia, valve dysfunction, and thoracic duct reflux. UMLS:C5681848 MEDGEN:1802645 GARD:0022306