The Human Phenotype Ontology (HPO) provides the following list of features that have been reported in people with this condition. Much of the information in the HPO comes from Orphanet, a European rare disease database. If available, the list includes a rough estimate of how common a feature is (its frequency). Frequencies are based on a specific study and may not be representative of all studies. You can use the MedlinePlus Medical Dictionary for definitions of the terms below.
|Signs and Symptoms||Approximate number of patients (when available)|
|Abnormality of extrapyramidal motor function||-|
|Autosomal recessive inheritance||-|
|Cerebral cortical atrophy||-|
|Decreased methionine synthase activity||-|
|Decreased methylmalonyl-CoA mutase activity||-|
|Failure to thrive||-|
|Feeding difficulties in infancy||-|
|Reduced visual acuity||-|
The resources below provide information about treatment options for this condition. If you have questions about which treatment is right for you, talk to your healthcare professional.
Nonprofit support and advocacy groups bring together patients, families, medical professionals, and researchers. These groups often raise awareness, provide support, and develop patient-centered information. Many are the driving force behind research for better treatments and possible cures. They can direct people to research, resources, and services. Many groups also have experts who serve as medical advisors. Visit their website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.
These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.
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How long do people live on average with cobalamin-C? What is the best case scenario with symptoms? Is cobalamin-C better or worse than methylmalonic acidemia? My baby failed her newborn screen. We are awaiting her final test results, but the doctor says it is probably cobalamin-C. See answer