%0 Case Reports %T Case Report: Novel Mutations in the PCCB Gene Causing Late-Onset Propionic Acidemia. %A Ji G %A Liu Y %A Song X %A Li Z %A Ji G %A Liu Y %A Song X %A Li Z %J Front Genet %V 13 %N 0 %D 2022 %M 35368667 %F 4.772 %R 10.3389/fgene.2022.807822 %X Introduction: Propionic acidemia is an autosomal recessive metabolic disorder and the patients with adult onset are very rare. Methods: Two PCCB mutations were identified. Clinical data were collected from a patient, and metabolic screening and clinical exome sequencing analysis were performed. Results: Two novel mutations were identified in the PCCB gene: M1:c.404_406del:p.G135del and M2:c.632C>T:p.T211I. Conclusion: Late-onset propionic acidemia should be taken into account, and metabolic screening as well as gene analysis should be performed to make a definite diagnosis timely.