延髓背外侧综合征又称Wallenberg综合征,临床多见于小脑后下动脉血栓形成。现将经磁共振(MRI)证实的3例报告如下。病例报告例1:男,72岁。晨起突然眩晕、恶心呕吐、视物旋转、声音嘶哑、饮水呛、站立不稳、向左侧倾倒7天入院。查体:左侧霍纳氏征,左软腭低、运动差, Medullary dorsolateral syndrome, also known as Wallenberg syndrome, more common in clinical subclavian artery thrombosis. Now confirmed by magnetic resonance (MRI) in 3 cases reported as follows. Case Report Example 1: Male, 72 years old. Suddenly morning suddenly dizziness, nausea and vomiting, depending on the material rotation, hoarseness, drinking choke, standing firm, to the left to pour 7 days admission. Physical examination: left Horner’s sign, low left palate, poor exercise,