This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.
|Medical Terms||Other Names||
|30%-79% of people have these symptoms|
|Decreased liver function||
|Decreased plasma total carnitine||0011936|
Exercise-induced muscle pain
Muscle pain on exercise
Muscle pain with exercise
Muscle pain, exercise-induced[ more ]
|Fatigable weakness of neck muscles||0030199|
High blood ammonia levels
Low or weak muscle tone
|Proximal muscle weakness||
Weakness in muscles of upper arms and upper legs
|Reduced tendon reflexes||0001315|
|5%-29% of people have these symptoms|
|Abnormal lactate dehydrogenase level||0045040|
Abnormal heart rate
Heart rhythm disorders
Irregular heart beat
Irregular heartbeat[ more ]
|Bilateral tonic-clonic seizure||
Grand mal seizures
Increased heart size[ more ]
|Delayed speech and language development||
Deficiency of speech development
Delayed language development
Delayed speech acquisition
Delayed speech development
Impaired speech and language development
Impaired speech development
Language development deficit
Late-onset speech development
Poor language development
Speech and language delay
Speech and language difficulties
Speech delay[ more ]
|Elevated hepatic transaminase||
High liver enzymes
|Elevated serum creatine kinase||
Elevated blood creatine phosphokinase
Elevated circulating creatine phosphokinase
Elevated creatine kinase
Elevated serum CPK
Elevated serum creatine phosphokinase
High serum creatine kinase
Increased creatine kinase
Increased creatine phosphokinase
Increased serum CK
Increased serum creatine kinase
Increased serum creatine phosphokinase[ more ]
|Elevated urinary 3-hydroxybutyric acid||0040155|
Tiredness[ more ]
|Febrile seizure (within the age range of 3 months to 6 years)||
Fever induced seizures
Fatty infiltration of liver
Fatty liver[ more ]
Low blood sugar
High levels of ketone bodies
|Loss of consciousness||
Increased size of skull
Large head circumference[ more ]
Muscle tissue disease
|Skeletal muscle atrophy||
Muscle wasting[ more ]
|Percent of people who have these symptoms is not available through HPO|
Swelling of brain
|Decreased plasma carnitine||0003234|
Decreased muscle tone
Low muscle tone[ more ]
High urine glycine levels
|Medium chain dicarboxylic aciduria||0008309|
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.
If you need medical advice, you can look for doctors or other healthcare professionals who have experience with this disease. You may find these specialists through advocacy organizations, clinical trials, or articles published in medical journals. You may also want to contact a university or tertiary medical center in your area, because these centers tend to see more complex cases and have the latest technology and treatments.
If you can’t find a specialist in your local area, try contacting national or international specialists. They may be able to refer you to someone they know through conferences or research efforts. Some specialists may be willing to consult with you or your local doctors over the phone or by email if you can't travel to them for care.
You can find more tips in our guide, How to Find a Disease Specialist. We also encourage you to explore the rest of this page to find resources that can help you find specialists.
Related diseases are conditions that have similar signs and symptoms. A health care provider may consider these conditions in the table below when making a diagnosis. Please note that the table may not include all the possible conditions related to this disease.
Conditions with similar signs and symptoms from Orphanet
Differential diagnosis includes other disorders of mitochondrial fatty acid oxidation including multiple acyl-CoA dehydrogenase deficiency (MADD) (see this term).
Visit the Orphanet disease page for more information.
Research helps us better understand diseases and can lead to advances in diagnosis and treatment. This section provides resources to help you learn about medical research and ways to get involved.
Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.
Living with a genetic or rare disease can impact the daily lives of patients and families. These resources can help families navigate various aspects of living with a rare disease.
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.
Questions sent to GARD may be posted here if the information could be helpful to others. We remove all identifying information when posting a question to protect your privacy. If you do not want your question posted, please let us know. Submit a new question
I am wondering if there is any information about children suffering from MCADD experiencing white stools for any reason related to the metabolic disorder. Is this a sign that my daughter is getting fat build-up on her heart, brain, or liver? Please let me know what you think. See answer
My daughter was diagnosed with medium-chain acyl-coenzyme A dehydrogenase deficiency at 2 weeks. She is now 10 weeks old and seems to eat a lot. She's having breast and bottle milk but can drink 80z of hungry baby formula. Is it normal for her to be hungry all the time? Also, what happens to the fats as she can't break them down further? See answer
I have two sons with MCAD deficiency. I was recently told by the doctor that my sons will not be able to consume any alcohol when old enough to do so because it could lead to death. I would really like more information on this. See answer
My sister's daughter (my niece) recently had a baby and he was diagnosed with medium-chain acyl-coenzyme A dehydrogenase (MCAD) deficiency. If this condition is traced back to my sister, is it important for me and/or my children (ages 8 and 11) to be tested? See answer
My daughter had newborn screening performed at the hospital after her birth. Her doctor recently called to tell us that her test came back abnormal for medium-chain acyl-coenzyme A dehydrogenase (MCAD) deficiency. Are there factors that may contribute to a falsely positive result? See answer