Rapidly Progressive Spastic Paraplegia Due to Hyperhomocysteinemia in Child with MTHFR Gene Mutation and Mitochondrial Complex I Deficiency: A Rare Association

儿童高同型半胱氨酸血症合并MTHFR基因突变和线粒体复合物I缺陷引起的快速进展性痉挛性截瘫：一种罕见的关联