嚼肌间隙病变的CT、MRI诊断

目的探讨嚼肌间隙病变的CT、MRI表现。方法43例中28例行CT扫描,10例行MR扫描,4例同时行CT及MR扫描。结果炎症或脓肿形成9例,具有侵犯范围广及向周围扩散的典型特点;嚼肌间隙原发肿瘤包括横纹肌肉瘤6例,血管瘤5例,成骨肉瘤4例,均有各自较典型的CT或MRI表现;转移瘤19例,均为周围肿瘤直接侵犯嚼肌或下颌支,原发肿瘤以头颈部鳞癌为主。结论嚼肌间隙感染及大部分原发肿瘤均有CT和(或)MRI特征性表现。

CT and MRI Diagnosis of Masticator Space Lesions

Objective To evaluate the CT and MRI features of masticator space lesions.Methods All patients(43 cases) were examined with CT (28 cases) or MRI(10 cases),and 4 cases underwent both CT and MR examination.Results 9 cases of masticator space infection were found,which had characteristic appearances and patterns of widely spread on CT and MRI,and CT was better in detecting mandibular osteomyelitis.Primary tumors of the space included 6 cases of rhabdomyosarcomas,5 cases of angioma,4 cases of osteosarcomas.Most of them had the particular CT or MRI features.In 19 cases of metastasis of the space,most came from surrounding structures,especially from squamous cell carcinoma of the head and neck,and penetrating deeply into the muscles or ramus of masticator space.Conclusion The masticator space lesions(infection and most of tumors) are of characteristic features on CT and MRI.