Homocystinuria due to CBS deficiency is an
The symptoms of the vitamin B6 responsive form of homocystinuria are generally milder than those of the non-responsive form. Some people with homocystinuria do not develop symptoms until adulthood. One of the only symptoms in adults with homocystinuria may be blood clots.
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||
|80%-99% of people have these symptoms|
Long slender fingers
Spider fingers[ more ]
Overcrowding of teeth[ more ]
|Disproportionate tall stature||0001519|
Mental retardation, nonspecific
Mental-retardation[ more ]
Increased fracture rate
Multiple spontaneous fractures
Varying degree of multiple fractures[ more ]
|30%-79% of people have these symptoms|
Wandering eye[ more ]
Blood clot in artery
Disruption of blood oxygen supply to brain
Stiff joints[ more ]
Round back[ more ]
Nearsightedness[ more ]
Blood clot in artery of lung
|Sparse scalp hair||
Reduced/lack of hair on scalp
Scalp hair, thinning
Sparse, thin scalp hair
sparse-absent scalp hair[ more ]
Blood clot in vein
|5%-29% of people have these symptoms|
|Abnormality of retinal pigmentation||0007703|
Clouding of the lens of the eye
Cloudy lens[ more ]
|Elevated hepatic transaminase||
High liver enzymes
Enlarged vein in esophagus
|Failure to thrive||
Weight faltering[ more ]
Paralysis or weakness of one side of body
Increased palatal height[ more ]
Bleeding within the skull
Bleeding below the skin
|1%-4% of people have these symptoms|
Partially dislocated lens
Loss of eyesight
Poor vision[ more ]
|Percent of people who have these symptoms is not available through HPO|
Psychiatric disturbances[ more ]
|Biconcave vertebral bodies||0004586|
Fatty infiltration of liver
Fatty liver[ more ]
High urine homocystine levels
Elevated blood homocystine
Increased methionine in blood
|Hypopigmentation of the skin||
Patchy lightened skin
|Limitation of joint mobility||
Decreased joint mobility
Decreased mobility of joints
Limited joint mobility
Limited joint motion[ more ]
|Mitral valve prolapse||0001634|
Increased body height
Making a diagnosis for a genetic or rare disease can often be challenging. Healthcare professionals typically look at a person’s medical history, symptoms, physical exam, and laboratory test results in order to make a diagnosis. The following resources provide information relating to diagnosis and testing for this condition. If you have questions about getting a diagnosis, you should contact a healthcare professional.
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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.
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.
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.