NCIthesaurus elephantiasis NCI:C34569 UMLS_CUI:C0013882 A lymphedema that is characterised by edema, hypertrophy, and fibrosis of skin and subcutaneous tissues, due to obstruction of lymphatic vessels resulting in the enlargement and hardening of limbs or body parts due to tissue swelling (edema). disease_ontology DOID:4976 MESH:D004604 SNOMEDCT_US_2025_09_01:155485008 lymphedema