咽旁间隙肿块的CT诊断

Diagnosis for the masses in parapharyngeal spaces by CT scanning

目的探讨咽旁间隙区肿块的CT表现,了解其影像特点。方法分析经手术及病理证实的16例涎腺肿瘤的CT影像学特点。结果6例涎腺良性肿瘤中,5例呈圆形或椭圆形,1例呈多结节分叶状,增强后均匀强化;肿物边缘清楚,密度较均匀。5例涎腺恶性肿瘤轮廓不规则,边界不清楚,并伴有不同程度的周围结构受侵,密度不均匀,增强后明显强化。结论咽旁间隙肿块的部位、边界、包膜、密度及茎突移位情况是鉴别肿瘤良恶性的主要依据,CT对此具有重要鉴别诊断价值。

Objective To explore the image features of the masses in parapharyngeal spaces by CT scanning. Methods Sixteen cases with masses in parapharyngeal spaces were included in this study. Their diagnosis was finally determined on the basis of histopathological assay following operarive therapy. Then, carefully analyzed were their CT image features with an emphasized consideration on the differential diagnosis between benign and malignant rumor. Results Among the 6 cases with benign salivary gland mass, 5 showed round or oval mass images and 1 appeared as lobulated multiple nodular image in CT films, all being homogeneously intensified following enhancer used. The margin of these mass images was shown very clear and the intensity of masses looked homogeneous. In contrast, all the 5 cases with malignant salivary gland mass showed such image features as with irregular mass contour and obscured border, being non-homogeneous in their intensity, accompanied with destruction in the around tissue structures at various degrees, and significantly intensified mass image following enhancer using. Conclusions The significant features of CT image of mass in parapharyngeal spaces include its occupied sire, border, capsule, intensity and the range of styloid process displacement. Identification of these features should be valuable in the differential diagnosis of benign and malignant tumors as the main diagnostic image evidences in this area.