泪腺恶性上皮性肿瘤的CT、MRI诊断

目的 总结泪腺恶性上皮性肿瘤的CT和MRI表现.方法 回顾性分析16例经病理学证实的泪腺恶性上皮性肿瘤CT和MRI影像资料.结果 16例泪腺恶性上皮性肿瘤,15例位于泪腺窝,1例位于眶缘前.5例呈类圆形,11例呈不规则形(其中9例后缘变尖,5例沿眶壁前后方向或上下方向生长),8例泪腺窝骨质受压,6例眶壁骨质破坏,1例眶壁骨质硬化;3例侵犯颅内;1例见额部皮下转移灶;2例CT可见钙化.MRI示肿瘤呈等、长T_1长T2信号,增强扫描可见强化.结论 CT及MRI可显示泪腺恶性上皮性肿瘤的特征,有助于泪腺恶性上皮性肿瘤的诊断及鉴别诊断.

CT and MRI Diagnosis of Malignant Epithelial Tumors of Lacrimal Gland

Objective To investigate CT and MR imaging findings of malignant epithelial tumors of the lacrimal gland. Methods CT and MR imaging findings were retrospectively analyzed in 16 patients with malignant epithelial tumors of the lacrimal gland confirmed by pathology. Results The malignant epithelial tumors located in the lacrimal fossa in 15 patients, anterior to the orbital rim in 1 patient. The tumors appeared as oval shape in 5 and irregular-shape in 11 (including tapering to a point posteriorly in 9, a flat-shape extending anterioposteriorly or inferosuperiorly along the orbit wall in 5). The compressive bone changes in 8, destruction of bone in 6, sclerosis of bone in 1, dura thickening and enhancing in 3, subcutaneous metastases in forehead in 1 and calcification in 2 were showed by CT and MR imaging. The lesions were hypointense or isointense on T_1 WI, hyperintense on T_2 WI and marked contrast enhancement. Conclusion CT and MR imaging can demonstrate the characteristics of the malignant epithelial tumors of the lacrimal gland, which may contribute to the diagnosis and differential diagnosis.