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| CT and MRI features of testicular epidermoid cyst |
| Department of Radiology, Shengjing Hospital of China Medical University, Shenyang 110004, China |
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Abstract Objective: To investigate CT and MRI features of testicular epidermoid cyst(TEC) and increase understanding of the disease. Methods: Preoperative CT and MRI data of 16 pathologically proved TEC were analyzed retrospectively. Eleven cases underwent MRI scan and one of them also underwent enhanced MRI. Five cases underwent CT examination and four of them also underwent enhanced CT scan as well. Summarize the CT and MRI features of TEC. Results: According to the images, all cases showed single lesion, in which 9 were located in the left testicle and 7 in the right. Fifteen lesions were round or oval and 1 lesion was irregular. All lesions were well-marginated, with an average maximum diameter of (2.28±1.72) cm. Among the 11 cases underwent MRI, 6 showed unevenly slightly low or high signal, 5 lesions showed evenly slightly low or low signal and 2 showed regionally high signal in the lesion center, called “target sign”, on T1WI. Ten showed unevenly slightly high or high signal, 1 showed unevenly high signal and 11 showed low signal ring on T2WI. Among the 5 cases undergoing CT, 2 showed evenly slightly low density, 2 showed evenly low density and 1 showed nodular calcification. In the 3 cases with calcification, 1 showed annular calcified in the wall and 1 showed a large lesion with striped and punctate calcification. The 5 cases undergoing enhanced examination(both MRI and CT) showed slight enhancement in the wall without enhancement in the center. Conclusion: TEC is characterized by unilateral round or oval cystic lesion in testicle, which shows low or slightly low density with calcification on CT, evenly or unevenly low or slightly low signal on T1WI and high or slightly high signal on T2WI with almost all the lesion showing low signal ring.
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Received: 10 February 2015
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Corresponding Authors:
GUO Wen-li
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