Matias Gonçalo, Canas Nuno, Antunes Isabel, Vale José
Serviço de Neurologia, Hospital de Egas Moniz, Lisboa.
Acta Med Port. 2008 Jul-Aug;21(4):387-90. Epub 2008 Oct 24.
The neurologic symptoms in malaria are usually associated with a severe infection by Plasmodium falciparum. Less frequently, the presence of impaired consciousness, seizures and visual and auditory deficits is related with hypoglycemia (by malaria or quinine) or with the toxicity of anti-malarial drugs. In the last years, it was recognized a rare neurologic complication after the efficient treatment of Plasmodium falciparum malaria - post-malaria neurologic syndrome (PMNS). PMNS occurs days to weeks after the parasite clearance, presenting as an encephalopathy of variable severity. The pathogenic mechanisms involved in PMNS are not well understood, being admitted a possible immunological cause. We describe a case of a 61-year-old man presenting with a severe encephalopathy (delirium, cerebellar ataxia and ophthalmoparesis ), 2 days after complete recovery from Plasmodium falciparum malaria. Peripheral blood smears were repeatedly negative for malaria parasites. MRI during acute phase showed extensive multifocal white matter abnormalities. He was treated with high-dose methylprednisolone with complete resolution of neurological deficits. After 9 months the MRI showed minimal residual lesions.
疟疾的神经系统症状通常与恶性疟原虫的严重感染有关。意识障碍、癫痫发作以及视觉和听觉缺陷较少见,与低血糖(由疟疾或奎宁引起)或抗疟药物的毒性有关。近年来,人们认识到在有效治疗恶性疟原虫疟疾后会出现一种罕见的神经系统并发症——疟疾后神经综合征(PMNS)。PMNS在寄生虫清除后的数天至数周内出现,表现为严重程度不一的脑病。PMNS所涉及的致病机制尚不清楚,推测可能有免疫方面的原因。我们报告一例61岁男性病例,该患者在从恶性疟原虫疟疾完全康复2天后出现严重脑病(谵妄、小脑共济失调和眼肌麻痹)。外周血涂片多次未检测到疟原虫。急性期的MRI显示广泛的多灶性白质异常。他接受了大剂量甲泼尼龙治疗,神经功能缺损完全消失。9个月后,MRI显示残留病变极少。