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目的:探讨睾丸表皮样囊肿(TEC)的CT、MRI表现,提高该疾病认识。方法:回顾性分析16例经我院外科手术病理证实的TEC术前CT和MRI资料。11例接受睾丸MRI平扫,其中1例同时接受睾丸MRI增强检查。5例接受CT检查,其中4例同时接受睾丸增强CT检查。总结TEC的CT、MRI影像表现。结果:肿瘤均为单发肿瘤,位于左侧睾丸者9例,位于右侧睾丸者7例。15个病灶呈类圆形或类椭圆形,1个病灶形态不整。所有病灶边界清晰。病灶平均最大径为(2.28±1.72)cm。11例接受MRI检查中,T_1WI上6个病灶呈不均匀的稍低信号或稍高信号,5个病灶呈均匀稍低或低信号,其中2个病灶中心局限性高信号,呈“靶征”;T_2WI上10个病灶呈不均匀的稍高或高信号,1个病灶呈均匀的高信号,11个病灶均见T_2WI低信号环影。5例行CT检查中,2例呈均匀稍低密度,2例呈均匀低密度,1例整个病灶呈结节样钙化密度改变。3例合并钙化,其中1例病灶壁见环形钙化,1例病灶较大,内见多发条片状及点状钙化。5例增强检查(1例增强MRI,4例增强CT)病灶中心未见强化,病灶壁见轻度强化。结论:TEC表现为单侧睾丸的类圆形或椭圆形囊性病灶,CT上表现为低或稍低密度病灶,可合并钙化灶;MRI T1WI表现为均匀或不均匀稍低或低信号,T2WI表现为稍高或高信号,几乎所有病灶均见低信号纤维环,结合典型影像表现有助于明确诊断。
Objective: To explore the CT and MRI findings of testicular epidermoid cyst (TEC) and to improve the understanding of the disease. Methods: The data of 16 preoperative CT and MRI confirmed by surgical pathology in our hospital were retrospectively analyzed. Eleven patients underwent testicular MRI scan, of which 1 patient underwent testicular MRI enhancement. 5 patients underwent CT examination, of which 4 patients underwent simultaneous testicular enhanced CT. Summarize TEC CT, MRI imaging performance. Results: The tumors were all single tumors, 9 in the left testes and 7 in the right testes. 15 lesions were round or oval-shaped, a lesion is not complete. All lesions clear boundary. The average diameter of the lesions was (2.28 ± 1.72) cm. Of the 11 patients undergoing MRI examination, 6 lesions on T_1WI showed slightly lower signal or slightly higher signal, and 5 lesions showed slightly lower or lower signal, of which 2 lesions were localized high signal with “target sign ”T 2WI 10 lesions were slightly higher or higher signal was uneven, 1 lesions were uniform high signal, 11 lesions were seen T_2WI low signal loop shadow. Five routine CT examination, two cases showed a uniform low density, two cases showed a uniform low density, a case of nodules-like calcification density changes. 3 cases were complicated with calcification, of which 1 case showed circular calcification in the wall of the lesion, and 1 case had larger lesion. See multiple cytoplasm and punctate calcification. Five cases of enhanced examination (one case of enhanced MRI, four cases of enhanced CT) did not strengthen the center of the lesion, the lesion showed mild enhancement. CONCLUSIONS: TEC presents as a round or oval cystic lesion of unilateral testes with low or slightly low density lesions on CT, which can be associated with calcification. MRI shows uniform or non-uniform slightly lower or lower signals on T2WI The performance of slightly higher or high signal, almost all lesions were seen low signal annulus, combined with the typical imaging findings help to confirm the diagnosis.