National Center for Advancing and Translational Sciences Genetic and Rare Diseases Information Center, a program of the National Center for Advancing and Translational Sciences

Morquio syndrome B



Other Names:
Mucopolysaccharidosis type IVB; MPS IVB; MPS 4B
Categories:
This disease is grouped under:

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.

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Medical Terms Other Names
Learn More:
HPO ID
Percent of people who have these symptoms is not available through HPO
Aortic valve stenosis
Narrowing of aortic valve
0001650
Autosomal recessive inheritance 0000007
Carious teeth
Dental cavities
Tooth cavities
Tooth decay
[ more ]
0000670
Cervical myelopathy 0002318
Cervical subluxation 0003308
Coarse facial features
Coarse facial appearance
0000280
Constricted iliac wings 0003277
Coxa valga 0002673
Decreased beta-galactosidase activity 0008166
Disproportionate short-trunk short stature
Disproportionate short-trunked dwarfism
Disproportionate short-trunked short stature
Short-trunked dwarfism
[ more ]
0003521
Epiphyseal deformities of tubular bones 0003053
Flaring of rib cage 0000904
Genu valgum
Knock knees
0002857
Grayish enamel
Gray colored tooth enamel
Greyish enamel
[ more ]
0000683
Hearing impairment
Deafness
Hearing defect
[ more ]
0000365
Hepatomegaly
Enlarged liver
0002240
Hyperlordosis
Prominent swayback
0003307
Hypoplasia of the odontoid process 0003311
Inguinal hernia 0000023
Intimal thickening in the coronary arteries 0005292
Joint laxity
Joint instability
Lax joints
Loose-jointedness
Loosejointedness
[ more ]
0001388
Juvenile onset
Signs and symptoms begin before 15 years of age
0003621
Keratan sulfate excretion in urine 0012069
Kyphosis
Hunched back
Round back
[ more ]
0002808
Mandibular prognathia
Big lower jaw
Increased projection of lower jaw
Increased size of lower jaw
Large lower jaw
Prominent chin
Prominent lower jaw
[ more ]
0000303
Metaphyseal widening
Broad wide portion of long bone
0003016
Opacification of the corneal stroma 0007759
Osteoporosis 0000939
Ovoid vertebral bodies 0003300
Platyspondyly
Flattened vertebrae
0000926
Pointed proximal second through fifth metacarpals 0001223
Prominent sternum 0000884
Recurrent upper respiratory tract infections
Recurrent colds
0002788
Restrictive ventilatory defect
Stiff lung or chest wall causing decreased lung volume
0002091
Scoliosis 0002650
Ulnar deviation of the wrist 0003049
Wide mouth
Broad mouth
Large mouth
[ more ]
0000154
Widely spaced teeth
Wide-spaced teeth
Widely-spaced teeth
[ more ]
0000687
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Last updated: 7/1/2020

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.

Management Guidelines

  • Project OrphanAnesthesia is a project whose aim is to create peer-reviewed, readily accessible guidelines for patients with rare diseases and for the anesthesiologists caring for them. The project is a collaborative effort of the German Society of Anesthesiology and Intensive Care, Orphanet, the European Society of Pediatric Anesthesia, anesthetists and rare disease experts with the aim to contribute to patient safety.

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.

Healthcare Resources


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.

Patient Registry

  • The Lysosomal Disease Network is a team of doctors, nurses, research coordinators, and research labs throughout the U.S., working together to improve the lives of people with this condition through research. The Lysosomal Disease Network has a registry for patients who wish to be contacted about clinical research opportunities.

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.

Organizations Supporting this 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.

Where to Start

In-Depth Information

  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Morquio syndrome B. Click on the link to view a sample search on this topic.

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.