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目的探讨颅内原发黑色素瘤的影像学表现,以提高对该病的认识和诊断正确率。方法回顾性分析经手术病理证实的4例颅内原发黑色素瘤MRI、CT表现;4例患者均进行MRI检查,其中3例同时行CT检查。结果CT平扫均为高密度,密度部分不均匀,增强扫描肿瘤明显强化。4例MRIT1WI肿瘤均表现为高信号为主,其中2例T2WI为低信号,2例为高低混杂信号,肿瘤内信号部分不均匀,增强后扫描肿瘤可见明显强化。结论颅内原发黑色素瘤MRI具有特征性表现,对于显示肿瘤范围、成分及脑膜的浸润和定性诊断较CT有优势。
Objective To study the imaging manifestations of intracranial primary melanoma in order to improve the recognition and diagnosis of this disease. Methods Four cases of primary intracranial melanoma confirmed by surgery and pathology were retrospectively analyzed by MRI and CT. All four cases were examined by MRI, of which 3 cases underwent CT examination at the same time. Results CT scan were high density, density is not uniform, enhanced scan enhanced significantly. In 4 cases of MRIT1WI tumors, all showed high signal, of which 2 cases had low signal of T2WI and 2 cases of high and low mixed signals. The signal in the tumor was not uniform and enhanced obviously after enhanced scan. Conclusions MRI of intracranial primary melanoma has the characteristic features. It has some advantages over CT in displaying infiltration and qualitative diagnosis of tumor range, composition and meninges.