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目的探讨首发部位为非中枢神经系统的非霍奇金淋巴瘤(NHL)病例的脑实质病变影像学表现特点。方法经病理确诊为体部非霍奇金淋巴瘤,行CT和/或MR I扫描发现脑实质异常的病例8例。对所有病灶增强CT扫描及MR I表现分类分析。另取有结节强化表现的其他脑转移瘤73例,与NHL病例组比较。结果CT增强扫描8例,共计病灶13个,分为①强化后低密度病灶(10/13,77%),边界均较模糊;②强化后高密度病灶(3/13,23%),其中环形强化结节1个。所有病灶均未见与脑转移病灶有关的脑室扩张和占位效应,有强化表现的结节周围未见水肿带。行MR I检查4例中3例呈长T1长T2信号,增强后无特殊信号改变。1例呈中央长T1长T2信号,周边长T1中长T2信号,增强后周边环形强化,无水肿带。73例有结节强化表现的其他脑转移瘤中89%的病灶CT可见灶周不同程度水肿。结论本组病例中部分病灶表现不同于文献描述的NHL脑转移征象。而与其他脑转移瘤相比,周边无水肿带的结节状强化病灶也是本组病例的特殊表现之一。
Objective To investigate the imaging features of brain parenchymal lesions in non-Hodgkin’s lymphoma (NHL) patients with non-central nervous system (NNS). Methods Totally 8 non-Hodgkin’s lymphoma patients were diagnosed pathologically according to CT and / or MRI scan. All lesions enhanced CT scan and MR I performance classification analysis. Another nodular enhancement of other brain metastases in 73 cases, compared with the NHL case group. Results CT enhanced CT scan in 8 cases, a total of 13 lesions, divided into ① enhanced low-density lesions (10/13, 77%), the boundaries are more obscure; ② enhanced high-density lesions (3 / 13,23%), Annular enhanced nodules 1. No lesions associated with brain metastases and ventricular dilatation and space-occupying effect were observed in all lesions, and there was no edema zone around the nodules with enhanced performance. Three cases of MRI examination in 4 cases showed long T1 long T2 signal, no special signal changes after enhancement. One case showed central long T1 long T2 signal, long peripheral T1 long T2 signal, after enhanced peripheral ring enhancement, no edema. 73 cases of nodular enhancement of other brain metastases in 89% of the lesions CT visible foci of varying degrees of edema. Conclusion Some of the lesions in this group showed different manifestations of NHL brain metastases as described in the literature. And compared with other brain metastases, peripheral nodules with no enhancement of the lesion is also one of the special manifestations of this group of patients.