CD很罕见 ,但在中耳良性肿瘤中却为常见肿瘤之一 ,其临床表现及诊治已备受重视 ,但对患早期鼓室球CD患者的瘤周中耳粘膜的组织学改变却尚无研究。鼓室 CD在肿瘤基质的血管网特点和血供方面与血管瘤类似 ,治疗靠手术切除 ,术时出血多 ,妨碍操作 ,肿瘤常无明确边界 ,瘤周粘膜常有 CD is rare, but it is one of the most common tumors in benign tumors of the middle ear. The clinical manifestations and diagnosis and treatment of CD are of great importance. However, there is no study on the histological changes of peri-medial mucosa in patients with early tympanic CD . Tympanum CD in the tumor stroma vascular network characteristics and blood supply with similar hemangiomas, treatment by surgical resection, bleeding and more hinder the operation, the tumor often no clear boundary, peritumoral mucosa often