先天性左房壁瘤是一种罕见疾病，分心包内型与心包外型。
Congenital aneurysm of left atria is rare disease that is devided into intrapericardial and extrapericardial types.
甲状舌管囊肿及鳃裂囊肿呈单房性，淋巴管瘤多为多房性，颈淋巴结囊性转移瘤伴有壁结节。
Most of the thyroglossal duct cyst and branchial cleft cyst were monolocular, while lymphangioma multilocular. Metastatic tumors of the cystic lymph nodes were always associated with wall nodule.
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