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目的 :探讨泪腺腺样囊性癌 X线、超声、CT及 MRI的影像学特征 ,以及各种检查方法对疾病诊断价值的比较。方法 :回顾性分析 1977～ 1999年经病理组织学确诊的泪腺腺样囊性癌 46例 ,对 X线 (8例 )、B超 (39例 )、CDI(7例 )、CT(37例 )、MRI(4例 )的特征进行比较。结果 :X线可以发现眼眶密度增高及眶骨破坏 ;B超可以发现眶内占位病变 ,且对病变内部的钙斑、液化腔等组织结构的显示良好 ;CDI可以提供肿瘤内部血液供应情况 ;CT可以揭示病变范围、生长方式、肿物与眶内正常结构的关系、眶骨及眶周结构的改变 ;MRI对于显示肿瘤颅内和颞凹蔓延 ,优于以上检查方法。结论 :联合应用多种影像学检查方法 ,可以提高术前诊断率
Objective: To investigate the imaging features of X-ray, ultrasonography, CT and MRI of lacrimal gland adenoid cystic carcinoma and to compare the diagnostic value of various examinations to the disease. Methods: Forty-six cases of lacrimal gland adenoid cystic carcinoma confirmed by histopathology from 1977 to 1999 were retrospectively analyzed. X-ray (8 cases), B-ultrasonography (39 cases), CDI (7 cases) , MRI (4 cases) characteristics were compared. Results: The orbital density and orbital bone destruction were found by X-ray. The intraorbital lesions were found by B-ultrasound, and the tissue structures such as calcium spots and liquefaction cavities in the lesion were well displayed. CDI could provide the internal blood supply of tumor. CT can reveal the extent of the lesion, the growth mode, the relationship between the tumor and the normal orbital structure, and the changes of the orbital bone and the periorbital structure. MRI is superior to the above method in displaying the intracranial and temporal concave spread of the tumor. Conclusion: The combination of multiple imaging methods can improve the preoperative diagnosis rate