眼球表面结膜皮样瘤及皮脂肪瘤的CT分析  

CT evaluation of the epibulbar dermoid and dermolipoma

作　　者：汪卫中[1] 杜凡[1] 李琛玮[2] 朱建跃[3] 赵冬青[1] 郭继华[3] 

机构地区：[1]解放军第474医院放射科,乌鲁木齐830011 [2]新疆医科大学第一附属医院MR室 [3]解放军第474医院病理科,乌鲁木齐830011

出　　处：《中华放射学杂志》2005年第5期472-474,共3页Chinese Journal of Radiology

摘　　要：目的　探讨眼球表面结膜皮样瘤及皮脂肪瘤的临床、病理及CT特征,评价CT检查的价值。方法　回顾性分析手术病理证实的眼球表面结膜皮样瘤及皮脂肪瘤12例,其中皮样瘤5例,皮脂肪瘤7例。女性多于男性(11∶1),均为单眼单个病灶,右眼多于左眼(9∶3)。术前均行常规眼眶CT横断面扫描,其中5例行增强扫描,分析其临床、病理及CT特征。结果　CT上病灶均表现为附着于眼环颞侧的新月形低密度影,最大25mm×15mm,最小8mm×5mm,外缘结膜下均有1~3mm厚的囊壁,增强后囊壁中度强化。皮样瘤较小,壁较厚,CT值-55^-75HU。皮脂肪瘤较大,壁较薄,CT值-80^-120HU。结论　CT检查可明确病灶的大小、范围、性质,以及与眼环、外直肌、泪腺等的关系,有助于提高手术成功率,减少并发症。Objective To investigate the CT imaging features and its diagnostic value in patients with epibulbar dermoid and dermolipoma. Methods Twelve cases with epibulbar dermoids and dermolipomas were retrospectively analyzed. There were 5 dermoids and 7 dermolipomas, and a distinct female predominance (11/12). The lesions located at the external canthus, and were almost always uniocular and single (right=9, left=3). Transverse plain CT scan was performed in all patients, contrast enhanced CT scan in 5 cases. The clinical aspects, pathological features, and CT findings were then described. Results Crescent-shaped hypodensity lesion attached to the epibulbar was detected in all cases on CT scan. The diameter ranged from 8 mm×5 mm to 25 mm×15 mm. The lesion had a thin wall (1- 3 mm) under the conjunctiva lateral, and could have middle enhancement. Conclusion CT can show the lesion′s range and characteristics, as well as the relationship with the adjacent structures. CT has great directive value for operating on these tumors, and reducing the complications.

关 键 词：结膜皮样瘤 眼球表面 脂肪瘤 CT分析 CT特征 CT检查 回顾性分析 横断面扫描 手术成功率 病理证实 眼眶CT 增强扫描 低密度影 CT值 病灶 结膜下 外直肌 并发症 临床 囊壁 

分 类 号：R739.7[医药卫生—肿瘤]