• (lymphangioma, benign) A benign neoplasm arising from the lymphatics.
  CDISC Terminology
  Clinical Data Interchange Standards Consortium (CDISC), 2021
• A benign lesion composed of dilated lymphatic channels. Painless swelling is the usual clinical manifestation.
  NCI
  U.S. National Cancer Institute, 2021
• A benign tumor resulting from a congenital malformation of the lymphatic system. Lymphangioendothelioma is a type of lymphangioma in which endothelial cells are the dominant component.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• Lymphangiomas are rare congenital malformations consisting of focal proliferations of well-differentiated lymphatic tissue in multi cystic or sponge like structures. Lymphangioma is usually asymptomatic due to its soft consistency but compression of adjacent structures can be seen due to the mass effect of a large tumor.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2025
• Lymphangiomas are bumps that form under the skin and are caused by a collection of enlarged lymph vessels, which are the channels that carry lymph (a clear fluid related to blood) throughout the body.
  Merck Manuals
  Merck & Co., Inc., 2025
• Lymphangiomas are uncommon, hamartomatous, congenital malformations of the lymphatic system that involve the skin and subcutaneous tissues. The classification of lymphangiomas lacks a standard clear definition and universal application, in part because of the nature of lymphangiomas, which represent a clinicopathologic continuum.
  Medscape
  WebMD, 2025