All six patients had acute onset of asymmetrical weakness without pain or sensory loss, and four of five who had cerebrospinal fluid (CSF) analysis had pleocytosis.

• 六位患者都出现急性发作的不对称无力，且有疼痛或感觉障碍。在五位进行脑脊髓液 (CSF) 分析的患者中，有四位出现脑脊髓液中淋巴球异常增多。