PURPOSE To present the CT and MR findings in children with propionic and methylmalonic acidemia. METHODS Twenty-three new patients with methylmalonic and 20 with propionic acidemia were examined with CT and/or MR of the brain. In total 52 CT and 55 MR studies were done. Twenty-six previously published cases were also reviewed. RESULTS The findings were similar in the two syndromes. During t...

Propionic acidemia is an organic acidemia that can lead to metabolic acidosis, coma and death, if not treated appropriately in the acute setting. Recent advancements in treatment have allowed patients with propionic acidemia to live beyond the neonatal period and acute presentation. The natural history of the disease is just beginning to be elucidated as individuals reach older ages. Recent stu...

We report an adult male with classic propionic acidemia (PA) who developed chronic kidney disease in the third decade of his life. This diagnosis was recognized by an increasing serum creatinine and confirmed by reduced glomerular filtration on a (99m)Tc-diethylenetriamine pentaacetate (DTPA) scan. Histopathology of the kidney showed moderate glomerulo- and tubulointerstitial fibrosis with very...

Propionic acidemia is an autosomal recessive disorder that is due to deficiency in the enzyme propionyl-CoA carboxylase. Cardiomyopathy is a well-known phenomenon in propionic acidemia that it may rapidly progress to death. Here we describe a case of propionic acidemia in a 27-yearold man who developed adult-onset secondary dilated cardiomyopathy. In early infancy he was diagnosed with propioni...

how to cite this article: karimzadeh p, jafari n, ahmad abadi f, jabbehdari s, taghdiri mm, alaee mr, ghofrani m, tonekaboni sh, nejad biglari h. propionic acidemia: diagnosis and neuroimaging findings of this neurometabolic disorder. iran j child neurol. 2014 winter; 8(1):58-61.   objective propionic acidemia is one of the rare congenital neurometabolic disorders with autosomal recessive inher...

Propionic acidemia is an inborn error of metabolism caused by deficiency of the mitochondrial enzyme propionyl-CoA carboxylase. Sensorineural deafness and severe hearing loss have been described as long-term complications of this disease, however, the mechanism has not yet been elucidated. We have recently shown by patch clamping experiments and Western blots that acute and chronic effects of a...

Derrick MacFabe’s hypothesis that propionic acid generated by gut bacteria induces autism [1], while compelling, leaves one question largely unanswered: Why do children with inborn propionic acidemia rarely show autistic behavior? Although exacerbations of Propionic Acidemia (PA) bear “some resemblance” to autism spectrum disorders (ASD), MacFabe noted, only one case of autism associated with P...

Neonatal-onset propionic acidemia is the most common form of disorder. A 9-days old new born admitted to our hospital with lethargy suggested urea cycle defect at first look due to lack of metabolic acidosis, normal ketone and anion gap in laboratory evaluations. The case mimicking urea cycle defect, which was diagnosed as neonatal-onset propionic acidemia by specific tests, was presented becau...

Propionic acidemia is a rare, autosomal, recessively inherited inborn error of propionate metabolism. It presents most often as a neonatal life threatening emergency with metabolic acidosis, hyperammonemia, hyperglycinemia and hyper gylcinuria. Since its first description in a male infant with episodic metabolic acidosis and hyperglycinemia(l), more than 100 cases have been reported. The presen...