<unk>  arises from lymph vessels, which are normally involved in the re-circulation of excess body fluid back into the blood stream. The exact pathogenesis of<unk>  is not fully understood. It is thought that<unk>  is caused by either sequestration of lymph tissue, abnormal budding of lymph vessels, lack of fusion with the venous system, or obstruction of lymph vessels.<unk> s most commonly develop at the head and neck regions.<unk>  is associated with a number of conditions that include Turner syndrome and Down syndrome. On gross pathology, characteristic findings of<unk>  include a grey-white, well circumscribed, edematous mass with a variable size and consistency. On microscopic histopathological analysis, characteristic findings of<unk>  include thin walled endothelial lining, intraluminal accumulation of eosinophilic deposits, and clusters of intraluminal lymphocytes. There are no known direct causes for<unk> .<unk>  must be differentiated from arteriovenous malformation, branchial cleft cyst, and dermoid cyst.<unk> s are rare, accounting for 4% of all vascular tumors among children. The incidence of<unk>  is estimated to be less than 2 cases per 100,000 individuals in the United States.<unk>  commonly affects individuals younger than 5 years of age.<unk>  affects men and women equally. There is no racial predilection to the<unk> . CT scan may be diagnostic of<unk> . Findings on CT scan suggestive of<unk>  include a homogeneous, cystic, mass that may demonstrate intrinsic septations and compression of adjacent organs. The mainstay of therapy for<unk>  is surgery. Treatment for<unk>  involves the removal of the abnormal tissue; however complete removal may be impossible without removing other normal areas. Most patients need at least two procedures done for the removal process to be achieved.
Lymphangioma
Hemangioma
Angioma
Cavernous angioma
Tufted angioma
Angiokeratoma
Spider angioma
Angiosarcoma