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目的：总结颅脑孤立性浆细胞瘤的ＭＲ表现，提高对该病的认识。方法：搜集了４例经我院病理证实的颅脑孤立性浆细胞瘤，全部病人均在我院行ＭＲ检查。ＭＲ扫描重点观察了肿瘤的发生部位，信号特点，侵润范围，骨质破坏情况，和增强扫描特征。根据病人病历资料，我们对病人的ＣＴ和Ｘ线平片表现也进行了总结，并与ＭＲ表现进行了对照。结果：４例颅脑孤立性浆细胞瘤中，两例肿瘤发生于额式顶骨，并造成相应的骨质破坏。另两例肿瘤与颅骨无任何联系，一例位于左额镰旁，一例位于右三角区。肿瘤多表现为均匀的等或稍低Ｔ１信号，等或稍高Ｔ２信号，注药后均匀强化。肿瘤边界清楚，无骨硬化及增生。本组３例行尿本周蛋白检查病人，全部表现阴性。结论：颅脑浆细胞瘤的ＭＲ表现与肿瘤起源部位和侵润范围有着密切关系。肿瘤的ＭＲ表现与某些常见中枢神经系统肿瘤十分相似，不易鉴别。ＭＲ能够清楚地显示肿瘤及其与周围组织的关系，是显示浆细胞瘤及其侵润范围的最佳影像学检查方法。
Objective: To summarize the MR manifestations of solitary plasmacytoma of the brain and improve the understanding of the disease. Methods: Four cases of brain solitary plasmacytoma confirmed by pathology in our hospital were collected. All patients underwent MR examination in our hospital. MR scan focused on the tumor location, signal characteristics, invasion range, bone destruction, and enhanced scan features. According to the patient’s medical history data, we also summarized the CT and X-ray findings of the patients and compared them with the MR findings. Results: In 4 cases of solitary brain plasmacytoma, two tumors occurred in frontal parietal bone and caused corresponding bone destruction. The other two tumors had no association with the skull, one in the left frontal falx and one in the right triangle. Tumors showed more uniform or slightly lower T1 signal, and so on or slightly higher T2 signal, uniform injection after strengthening. Clear tumor border, no sclerosis and hyperplasia. The group of 3 patients with urinary weekly protein examination of patients, all negative. Conclusion: The MR manifestations of brain plasmacytoma are closely related to the tumor origin and the extent of invasion. Tumor MR performance and some common central nervous system tumors are very similar, not easy to identify. MR can clearly show the tumor and its relationship with the surrounding tissue, which is the best imaging method to show plasmacytoma and its infiltration range.