摘要
目的探讨眼眶特发性炎性假瘤（IOIP）的CT和MRI表现特征，以提高对眼眶特发性炎性假瘤的认识和影像诊断水平。方法回顾分析我院2000年1月-2006年10月间80例（89只眼）IOIP患者CT及MR／资料，总结IOIP的影像学特征。结果①肌炎型IOIP：多条眼外肌受累18只眼，单条7只眼，16只眼（66．7％），同时累及肌腹和肌腱。眼外肌受累频率由高到低依次为外、下、内、上直肌。MRI检查呈等T1、略高T2信号。眶内其它组织受累17例，眶外侵犯4例。②肿块型IOIP：多数病灶形态不规则（18／21），边界不清楚（15／21）。5例“铸型”征阳性，7例眶尖脂肪影消失。MRI检查呈等T1、等或略高T2信号，信号不均匀。邻近组织受累18例，眶外侵犯3例。③泪腺炎型IOIP：泪腺扁长形肿胀，“铸型”征阳性，边缘模糊，密度均匀，增强后明显强化。MRI检查呈略高T1，T2信号。邻近组织受累7例。④巩膜炎及视神经炎型IOIP：4例眼环增厚，边缘模糊。其中3例累及视神经眶内段，2例增强后眼环明显强化。1例仅视神经边缘毛糙。邻近组织受累4例。⑤混合型IOIP：融合以上几型表现，呈多样化特征。结论IOIP的影像学表现复杂多样，但多具有炎性特征，眶内多种组织同时受累而以某一种组织为主。CT扫描可作为IOIP的首选检查方法之一，MRI对IOIP有无颅内受累的显示比CT更有优越性。
Objective To observe the imaging features of idiopathic orbital inflammatory pseudotumor（IOIP）. Methods Eighty IOIP cases seen between January,2000 and October,2006 in affiliated hospital were evaluated retrospectively. Results （1）Myositis type：Single muscle was involved in 7 eyes and multiple muscles in 18 eyes. Both muscle and tendon were involved simultaneously in 16 eyes（66. 7% ）. The signals were isointensity on T1 WI and less hyperintense on T2 WI, which could be enhanced by contrast. The other orbital structures except rectus were affected in 17 cases. Extraorbital extension were seen in 4 cases. （2） Mass type：Most masses in the orbit were diffuse with an ill-defined shape. Five cases showed the molding pattern and inflammatory infiltrate in the orbital apex was seen in 7 cases. The signals were simillar to that of the myositis on T1 WI and T2 WI. The neighboring orbital structures were affected in 18 cases. Extraorbital extension were seen in 3 cases. （3）Lacrimal type ： Most of the lacrimal glands showed diffuse enlargement with poorly defined margins. They were homogenous and showed marked enhancement after contrast. Swollen eyelid was seen in all of the 18 cases. （4）Scleritis and perineuritis type：Both the optic nerve and sclera were involved in 3 cases, the other 2 cases were involved respectively. Bone change and extraorbital extension were not found. （5）Mixed type：The imaging findings were various that depend on which orbital structures were affected. Conclusion The imaging features of IOIP were complex and various, but still had the certain own characteristics. It is common many kinds of orbital tissues were affected,while some tissue is primary.
出处
《潍坊医学院学报》
2008年第4期316-318,I0001,共4页
Acta Academiae Medicinae Weifang
关键词
眼眶
炎性假瘤
X线计算机
体层摄影术
磁共振成像
Orbit
Inflammatory pseudotumor
X-ray computed, tomography
Magnatic Resonance Image
Diagnosis
