Cystic hygroma: Fluid filled sac

Lymphatic: To do with lymphatic system composed of lymph and lymphatic vessels

Lymph: Transparent, usually slightly yellow, often opalescent liquid found within the lymphatic vessels, and collected from tissues in all parts of the body and returned to the blood via the lymphatic system

Edema: Swelling of subcutaneous tissues

Prenatal: Before birth

Translucent: Partially transparent allowing light to pass through diffusely

Sclerotherapy: Injection of a chemical irritant into a vein or similar structure to produce inflammation and eventual fibrosis and obliteration of the lumen

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