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目的探讨涎腺肌上皮瘤(ME)的 CT、MRI 表现。方法回顾性分析经手术和病理证实6例 ME 的 CT、MRI 表现(其中 CT 检查4例,MR 检查3例)并复习文献。结果 6例 ME 中位于硬腭4例,腮腺2例。病灶直径为1.2～3.5 cm,其中病灶呈椭圆形4例,呈分叶状2例。4例 CT 表现:病灶呈等密度3例,稍低密度1例,密度均匀和不均匀各2例,其中多发低密度结节灶1例;病灶边缘清晰锐利,相邻腭骨压迫吸收3例。增强检查病灶呈显著强化2例,最高 CT 值160 HU,呈轻、中度强化各1例。3例 MRI 表现:病灶信号(与肌肉相比较)T_1WI 呈等信号,其中均匀2例,不均匀1例;T_2WI 均为混杂高信号。病灶边缘光整1例,不规则2例,其中有棘状突起1例;增强检查病灶呈显著强化2例,呈中等强化1例。结论涎腺肿瘤影像检查出现显著强化,特别是腮腺、腭部,有助于提示ME 可能,确诊仍依靠病理。
Objective To investigate the CT and MRI findings of sarcoplasminomatosis (ME) in salivary gland. Methods The CT and MRI findings of 6 cases with ME confirmed by surgery and pathology were analyzed retrospectively (including 4 cases of CT and 3 cases of MR). The literature was reviewed. Results In 6 ME cases, 4 cases were located in the hard palate and 2 cases were parotid gland. Lesions diameter of 1.2 ~ 3.5 cm, of which lesions were oval in 4 cases, lobulated in 2 cases. In 4 cases of CT, the lesion showed 3 cases of equal density, 1 case of slightly low density, 2 cases of uniform and uneven density, 1 case of multiple low-density nodules. The edge of the lesion was clear and sharp, and the adjacent palatal bone compression absorbed 3 cases . Enhanced examination lesions were significantly enhanced in 2 cases, the maximum CT value of 160 HU, was mild and moderate enhancement in 1 case. The MRI findings of 3 cases showed that the lesion signal (compared with the muscle) showed equal signal in T_1WI, of which 2 cases were uniform and 1 case was not uniform. The T_2WI were all mixed high signal. One case of the edge of the lesion, irregular in 2 cases, including a spine-like protrusion in 1 case; enhanced examination lesions were significantly enhanced in 2 cases, showed moderate enhancement in 1 case. Conclusion The salivary gland tumor imaging examination showed significant enhancement, especially the parotid gland, palate, help to prompt the possibility of ME, the diagnosis is still dependent on the pathology.