颅骨嗜酸性肉芽肿影像学诊断

目的分析颅骨嗜酸性肉芽肿的影像学表现,提高其诊断水平。方法回顾性分析经手术病理证实的16例颅骨嗜酸性肉芽肿的影像资料。观察指标：病灶数目、部位、形态、大小、边缘、密度或信号及强化程度。结果单发15例,其中额骨6例,顶骨5例,枕骨3例,眼眶1例;多发1例共3个病灶,分别位于额骨、枕骨及斜坡。额骨、顶骨及枕骨病灶为圆形或类圆形,边缘清晰;眼眶及斜坡病灶形态不规则,边缘清晰伴有硬化缘。X线表现为溶骨性破坏,边界清楚,多边缘无硬化,仅眼眶及斜坡处病灶局部有硬化缘。CT主要表现为颅骨内外板类圆形骨质破坏,眼眶及斜坡病灶呈不规则侵蚀性骨质破坏,边界清楚,无骨膜反应;其中6例单发病灶及1例多发病灶均见骨质破坏内残留小点及细条骨片;软组织肿块部分呈均匀等密度,增强后软组织部分轻度强化。MRI均见骨质破坏区向颅骨内外形成软组织肿块,其中11例11个病灶T1WI呈低信号,4例6个病灶呈中等信号,1例1个病灶T1WI见斑点状高信号;T2WI及脂肪抑制序列均呈高信号,信号均匀;病灶软组织肿块均呈显著性强化。结论 X线结合MRI有助于诊断颅骨嗜酸性肉芽肿,具有较高的临床价值。

Imaging Diagnosis of Eosinophilic Granuloma of Skull

Objective To study various imaging findings of eosinophilic granuloma of skull to further improve its diagnosis.Methods A retrospective analysis was performed to assess the imaging appearance of 16 cases confirmed to be eosinophilic granuloma of skull by pathology.Evaluative indexes contain the lesions umber,site,shape,size,margin,density or signal and enhancement.Results Number and site:single lesion were demonstrated in 15 cases,locating in frontal bone in 6 cases,parietal bone in 5 cases,occipital bone i...