【摘要】 目的：探讨颅内黑色素瘤ＣＴ、ＭＲ影像特征及其诊断。材料和方法：７例颅内黑色素瘤患者中男４例，女３例，年龄１０～５９岁。５例皮肤有黑色素瘤，２例有颅内黑色素瘤切除史。２例行ＣＴ加ＭＲＩ，４例单行ＭＲ，１例仅行ＣＴ检查。结果：３例ＣＴ平扫均为高密度影，形态不规则。增强扫描肿瘤明显增强。６例ＭＲＩＴ１ＷＩ肿瘤均表现为高信号，其中５例Ｔ２ＷＩ低信号，１例低高信号。Ｔ１ＷＩ增强扫描６例不规则增强。结论：颅内黑色素性黑色素瘤ＭＲＩ具有特征性表现，而非黑色素性黑色素瘤不具特征性，ＭＲＩ显示黑色素瘤累及脑实质及浸润脑膜的范围和定性诊断优于ＣＴ。更多还原

【Abstract】 Purpose: Intracranial malignant melanoma is very rare and easily misdiagnosised among intracranial lesions. The CT, MR manifestations and differential diagnosis of seven cases of intracranial malignant melanoma were studied. Materials and Methods: There were 4 males and 3 females, age 10～59years. Five patients had primary melanomas in skin. Two patients had a operation history of intracranial melanoma. MR scans were done in 4 cases, CT in 1 and 2 had both CT and MR scans. Results: Three cases of melanomas were hyperintensity on noncontrast CT scan and markedly enhanced on contrast CT scan. In T 1 weighted MRI scan, tumor signal was hyperintensity in 6. In T 2 weighted MRI scan, tumor signal was hypointensity in 5, hyper hypointensity in 1. In the 6 cases of Gd DTPA enhanced T 1 Weighed images, the tumors were irregularly enhanced. Conclusion MR findings of intracranial melanin melanoma have its unique character, while nonmelania melanoma have no unique character. MR is better than CT on defining the areas of melanoma invading intraparenchymal and meninges and making a characteristic diagnosis of melanoma.更多还原