眼球脉络膜血管瘤的影像学表现

目的：探讨眼球脉络膜血管瘤的CT、MRI表现及其诊断、鉴别诊断价值。方法：回顾性分析9例经病理（3例）和临床证实（6例）的脉络膜血管瘤。CT扫描6例，MR检查4例，9例均行B超检查，3例作了眼底荧光血管造影。结果：2例CT平扫示眼球后极球壁轻度或新月形增厚，与球壁呈等密度，5例（1例平扫＋增强）增强示眼球后极部高密度梭形或扁平状隆起均匀肿块，瘤体强化明显。与玻璃体比较3例MR T1WI呈高信号，T2WI呈低信号，与视神经、眼外肌相比呈等信号；1例较小肿瘤辅以增强T1WI脂肪抑制技术被清楚显示。渗出性视网膜脱离在T1WI、T2WI上均呈中、高信号；增强T1WI瘤体显著强化，边界清晰，且信号均匀。B超检查8例为实质不均质肿块占位，1例为均质肿块占位，9例均探及视网膜脱离光带。结论：CT＋MRI＋B超检查对脉络膜血管瘤可得到较为全面的影像学诊断资料，MRI在该病的诊断及鉴别诊断中较CT及B超更具敏感性和特异性。

Imaging findings of global choroidal hemangioma

Objective To describe CT and MRI findings of the global choroidal hemangioma, and to investigate their value in the diagnosis and differentiation. Methods Nine choroidal hemangioma patients proven by surgical pathology( n =3)or clinic information ( n =6) were analyzed. CT scan was performed in 6 cases and MRI in 4 cases. All cases were examined by ultrasound and 3 with fundus fluorescein angiography (FFA). Results Two cases showed slight or crescent like thickening and iso density with respect to the global wall on CT scan. 5 cases on enhanced CT showed a flat or shuttle shaped homogeneous mass with marked enhancement. MRI ( n =3) revealed high signal intensity on T 1WI and low signal intensity on T 2WI with respect to the vitreous. 1 small tumor was found clearly by postcontrast fat suppressed T 1WI. Ultrasound showed homogeneous mass ( n =1) and inhomogeneous mass ( n =8), with retinal detachment in all cases. Conclusion CT + MRI + ultrasound can get most of the diagnostic imaging data for choroidal hemangioma. MRI was superior to CT and ultrasound in the diagnosis of choroidal hemangioma and differential diagnosis from other malignant tumors.