脉络膜黑色素瘤的磁共振诊断价值

摘要

目的：评价MRI检查对脉络膜黑色素瘤的诊断价值。材料与方法采用GE 1.5 T MR扫描仪对23例疑诊脉络膜黑色素瘤患者进行眼眶常规MRI平扫及增强检查，所有患者行手术治疗并取得病理诊断。结果23例患者中共18例经病理诊断证实为脉络膜黑色素瘤，其中16例瘤体T1WI显示稍高或高信号，2例为不均匀混杂信号，T2WI均显示为低信号，T2抑脂序列均为低信号。MRI检查对脉络膜黑色素瘤诊断的敏感度和特异度分别为83.3%和65.2%。结论脉络膜黑色素瘤具有MRI有特征性信号表现，MRI检查对诊断脉络膜黑色素瘤具有较好的诊断价值。%Objective: To analyze the value of MRI in diagnosis of choroidal melanoma. Materials and Methods: 23 cases of suspected diagnosis of choroidal melanoma were selected. Before operations, MRI examination including plain scan and enhanced scan were performed on all patients. The sensitivity and speciifcity of MRI were analyzed. Results:Sixteen of the lesions suspected of being choroidal melanomas were found to be hyperintense relative to vitreous on T1WI and hypointense on T2WI. The sensitivity and speciifcity of MRI was 83.3%and 65.2%respectively. Conclusions:This small retrospective study demonstrates that MRI detects the characteristic signals of choroidal melanoma. MRI is a valuable imaging technique in diagnosis of choroidal melanoma.