angioma       
noun [ C ]  medical specialized uk/ˌæn.dʒiˈəʊ.mə/ us/ˌæn.dʒiˈoʊ.mə/
 血管瘤;淋巴管瘤
a benign (= not likely to cause death) tumour consisting of a mass of blood or lymph vessels
  Lymph angiomas are benign tumours of the lymphatic vessels. 淋巴管瘤是在淋巴管中形成的良性肿瘤。 
 Surgeons found an angioma in his brain. 外科医生在他脑部发现了血管瘤。