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Treated thymic lymphoma: comparison of MR imaging with CT.

机译：治疗的胸腺淋巴瘤：MR成像与CT的比较。

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PURPOSE: To determine the appearance of treated thymic lymphoma at magnetic resonance (MR) imaging and to compare the results with findings from posttherapy computed tomography (CT) and clinical outcome. MATERIALS AND METHODS: MR images and CT scans in 25 patients with thymic lymphoma were reviewed. Dimensions of residual masses on MR and CT images were compared. Signal intensity on MR images was assigned to four patterns: (a) low heterogeneous, (b) low homogeneous, (c) high heterogeneous, and (d) high homogeneous. The presence of cysts, calcification, and fatty infiltration was noted. Abnormality of intrathoracic nodes was also documented. RESULTS: Dimensions of residual thymic masses were greater on MR images than on CT scans. The signal intensity pattern was low homogeneous or heterogeneous in 19 patients. Two of these patients had relapse within 1 year. High heterogeneous signal intensity was observed in five patients, four of whom had relapse. Cysts were seen at MR imaging in six patients, of whomone had relapse, but were seen in only one patient at CT. CONCLUSION: Treated thymic lymphoma usually has low signal intensity on MR images regardless of residual mass size, and cysts of high signal intensity may be seen. Relapse occurred mainly in large-volume masses or masses of high heterogeneous signal intensity, indicating that close follow-up or biopsy should be considered in such cases.
机译：目的：确定经过治疗的胸腺淋巴瘤在磁共振成像中的表现，并将结果与​​治疗后计算机断层扫描（CT）的结果和临床结果进行比较。材料与方法：回顾了25例胸腺淋巴瘤的MR图像和CT扫描。比较了MR和CT图像上残留质量的尺寸。 MR图像上的信号强度被分配为四个模式：（a）低异构，（b）低均匀，（c）高异构和（d）高均匀。注意到囊肿，钙化和脂肪浸润的存在。胸内淋巴结异常也被记录下来。结果：MR图像上的残留胸腺肿块尺寸大于CT扫描。 19名患者的信号强度模式为低均质或异质。其中两名患者在一年内复发。在五名患者中观察到高的异质信号强度，其中四名已复发。 MR成像中发现了6例复发的囊肿，但CT仅有1例。结论：无论残留的肿块大小如何，经治疗的胸腺淋巴瘤通常在MR图像上的信号强度均较低，并且可以看到信号强度较高的囊肿。复发主要发生在大量肿块或高异质信号强度的肿块中，这表明在这种情况下应考虑密切随访或活检。

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