头颈部腺样囊性癌的CT和MRI诊断  

CT and MRI Diagnosis of Adenoid Cystic Carcinoma of the Head and Neck

作　　者：刘梦雨[1] 马林[1] 杨波[1] 邹智彤[1] 

机构地区：[1]解放军总医院放射科,北京100853

出　　处：《实用放射学杂志》2008年第6期741-744,共4页Journal of Practical Radiology

摘　　要：目的探讨头颈部腺样囊性癌的CT和MRI表现,并评价2种影像检查方法的临床应用价值。方法回顾性分析16例经病理证实的头颈部腺样囊性癌患者的影像资料。结果16例中主要位于上颌窦5例,中耳、口底各3例,鼻咽、腮腺各2例,鼻腔1例。CT表现:受累部位可见形态不规则软组织肿块,边界不清6例,邻近骨有溶骨性骨质破坏3例。MRI表现:病变与肌肉比较,在T1WI肿瘤实质为等信号14例,稍低信号2例,其内有片状短T1信号3例;T2WI表现为等信号6例,稍高、高信号10例,信号不均匀9例。增强扫描病变实质部分明显强化15例,中等程度强化1例。有短T2分隔7例,分隔均不强化。结论CT扫描可清晰显示骨质破坏情况,MRI能够更清晰、准确显示病变侵犯范围。两者结合可为该病的诊断和治疗提供更全面的影像信息。Objective To study the CT and MRI findings of adenoid cystic carcinoma （ACC） of the head and neck. Methods All 16 cases of ACC were verified by histopathology. Imaging data were analyzed retrospectively. Results The lesion mainly occurred in maxillary sinus in 5 cases, in middle ear and in the floor of mouth in 3 cases respectively, in nasopharynx and parotid in 2 cases respectively, in nasal cavity in 1 case. On CT, the lesion showed ill defined and irregular - shaped soft mass in 6 cases and associated with osteolytic bony destruction in 3 cases. On MR T1WI, the lesion showed isointensity compared to the muscle in 14 cases and slightly hypointensity in 2 cases. On T2WI, the lesion showed isointensity in 6 cases, hyperintensity in 10 cases, heterogeneous intensity in 9 cases. Postcontrast MR imagings demonstrated obvious enhancement in 15 cases, moderate enhancement in 1 case. Lesion with short T2 septum in 7 cases, all of them showed no enhancement. Conclusion CT is the optimal modality in showing osteolytic bony destruction. MRI can demonstrate the invaded extent of the lesions clearly. Combined imaging modalities can provide more comprehensive information in diagnosis and therapy of adenoid cystic carcinoma of the head and neck.

关 键 词：腺样囊性癌 头颈部肿瘤 体层摄影术 X线计算机 磁共振成像 

分 类 号：R739.91[医药卫生—肿瘤] R814.42[医药卫生—临床医学]