眼眶肿瘤的CT、MRI诊断

目的:探讨眼眶肿瘤的CT、MRI表现及其诊断价值。材料和方法:回顾性分析38例经临床病理证实的眼眶肿瘤的CT、MRI表现。结果:视神经鞘脑膜瘤9例,表现为视神经增粗1例,梭形肿块6例和软组织肿块2例,CT为软组织密度;T1WI呈等或稍低信号,T2WI呈高信号。视神经胶质瘤6例,表现为视神经弥漫性增粗2例,椭圆形肿块4例;CT为软组织肿块;T1WI呈等信号,T2WI呈高信号。海绵状血管瘤12例,CT示类圆形稍高于脑组织密度影,T1WI呈稍低信号,T2WI明显高信号。恶性淋巴瘤4例,均为弥漫性病变,CT示长条状软组织肿块,T1WI呈等信号,T2WI呈高信号。神经鞘瘤3例;CT表现密度不均肿块,T1WI呈稍低信号,T2WI呈稍高信号,信号不均匀。转移瘤4例,其中转移性腺样囊性癌1例,乳腺癌眶内转移3例。结论:CT、MRI是发现和诊断眼眶肿瘤的重要检查手段,对大多数肿瘤可以做出明确诊断。

CT and MRI Diagnosis of Orbital Neoplasms

Purpose: To evaluate the CT and MRI findings of the orbital neoplasms. Materials and Methods: The CT and MRI appearances in 38 cases with orbital neoplasms were analyzed retrospectively, which were confirmed by pathology and clinical follow-up. Results: The optic nerve sheah meningioma was found in 9 cases. Of which, an enlargement of optic nerve was seen in 1 case, fusiform mass in 6 cases,and irregular mass in 2 cases. The tumor showed soft tissues density on CT, and hypo-or isointense mass on T1WI, and iso-or hyperintense mass on T2WI. The optic nerve glioma was found in 6 cases, which showed a diffuse enlargement of optic nerve in 2 cases and fusiform mass in 4 cases. The optic nerve glioma showed soft tissues density on CT, and hypointensity on T1WI and hyperintensity on T2WI. The cavernous hemangioma was found in 12 cases, which showed hypo-or isointense mass on T1WI, and hyperintensity mass on T2WI. The malignant lymphoma was found in 4 cases, which showed posterior to the orbital septum with irregular cast shape in 3 cases, and showed a diffuse infiltrative lesion in one case. The tumors showed hypointensity on T1WI and hyperintensity on T2WI. The neurilemmoma was found in 3 cases, which showed a soft tissues density on CT, and showed hypo-or isointense mass on T1WI, and hyperintensity mass on T2WI. The metastatic tumor was found in 4 cases. Conclusion: CT and MRI is an important examination method for diagnosing orbital neoplasms,and the diagnosis and differential diagnosis of orbital neoplasms in most cases can be made correctly.