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目的分析眶骨良性肿瘤与瘤样病变的CT表现,提高对此类病变的认识。方法回顾32例经手术、病理和临床证实的眶骨良性肿瘤与瘤样病变,包括良性肿瘤17例、瘤样病变15例。结果骨瘤9例,呈均一致密影、海绵骨样密度或磨砂玻璃样改变;骨化性纤维瘤5例,表现为边界清晰的膨胀性骨性肿块,内有骨化、囊变等;2例表皮样囊肿呈囊性密度;1例软骨瘤以钙化、骨化为主;骨纤维异常增殖症10例,受累骨不规则膨大,磨砂玻璃样密度伴囊变,边界不清;郎格罕氏细胞组织细胞增生症3例,不规则骨质破坏,边缘清晰;1例动脉瘤样骨囊肿表现为膨胀性肿块,有薄骨壳;1例石骨症眶骨增厚,呈均一致密影。结论眶骨良性肿瘤与瘤样病变的CT表现各具特征性,CT扫描能清晰显示病变范围、密度、边界以及与邻近结构的关系。
Objective To analyze the CT findings of benign orbital tumors and tumor-like lesions and to improve the understanding of such lesions. Methods Thirty - two cases of benign and malignant tumors of the orbital bone, including 17 benign tumors and 15 neoplastic lesions, were retrospectively reviewed. Results There were 9 cases of osteoma, which were uniformly dense, sponge-like or frosted glass. 5 cases of ossifying fibroma showed swollen bone mass with clear boundary, including ossification and cystic degeneration. Epidermoid cysts showed cystic densities. One case had calcification and ossification, while 10 cases had fibrous dysplasia. The affected bones were irregularly swollen with frosted glass-like density and cystic degeneration. 3 cases of histiocytosis, irregular bone destruction, clear edge; 1 case of aneurysmal bone cyst showed swollen mass, thin shell; 1 case of osteoporosis orbital bone thickened, were uniform dense shadow . Conclusion The CT findings of benign and malignant tumor of the orbital bone are characteristic. The CT scan can clearly show the relationship between the lesion extent, density, boundary and adjacent structures.