目的 探讨CT、MR1对头颈部腺样囊性癌的诊断价值.方法 回顾性分析20例经病理证实的头颈部腺样囊性癌的临床及CT、MRI资料.结果 病变发生于上腭者5例,口底4例,腮腺4例,鼻腔及上颌窦3例,颌下腺2例,泪腺及面颊部各1例.CT表现为类圆形或不规则形的软组织肿块,增强后不均匀强化,侵犯邻近骨质3例.MRI平扫病灶呈等或稍长T1信号,长T2信号,增强后病灶明显不均匀强化,2例可见神经侵犯征象.结论 CT对肿瘤周围骨质破坏情况显示较好,MR1能够更清晰显示病变形态、轮廓及侵犯范围.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 research the value of CT and MRI imagings in the diagnosis of adenoid cystic arcinoma (ACC) of the head and neck. Methods All 20 cases of ACC were proven by histopathology. Imaging data were analyzed retrospectively. Results The lesions mainly occurred in palate were 5 cases, in the floor of mouse were 4 cases, in parotid gland were 4 cases, in nasal cavity and maxillary sinus were 3 cases, in submandibular gland were 2 cases, in lacrimal gland and cheek each 1 case. On CT, the lesion showed round like or irregular-shaped soft mass, After contrast administration, the lesions had inhomogeneous enhancement, which were associated with osteolytic bony destruction in 3 cases. On MRI plain scan, the lesion showed equal or slightly long T1 WI signal, long T2WI signal. Postcontrast MR imagings demonstrated obvious inhomogeneous enhancement. Perineural infiltratoin was noted in 2 cases. Conclusion CT is the optimal modality in showing-osteolytic bony destruction. MRI can demonstrate the morphology and the invaded extent of the lesions clearly. Combined imaging modalities can provide more comprehensive information in diagnosis and therapy of ACC of the head and neck.
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