Synonyms: Multiple joint dislocations-short stature-craniofacial dysmorphism-congenital heart defects syndrome
Larsen-like syndrome B3GAT3 type is a rare genetic primary bone dysplasia characterized by laxity dislocations and contractures of the joints short stature foot deformities (e.g. clubfeet) broad tips of fingers and toes short neck dysmorphic facial features (hypertelorism downslanting palpebral fissures upturned nose with anteverted nares high arched palate) and various cardiac malformations. Severe disease is associated with multiple fractures osteopenia arachnodactyly and blue sclerae. A broad spectrum of additional features including scoliosis radio-ulnar synostosis mild developmental delay and various eye disorders (glaucoma amblyopia hyperopia astigmatism ptosis) are also reported.
Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview. Reference: Access aggregated data from Orphanet at Orphadata. Orphadata: Free access data from Orphanet. © INSERM 1999. Available on http://www.orphadata.org. Data version May 2026
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Larsen-like syndrome, B3GAT3 type?
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Advocacy Organizations
CDG CARE
Our mission is to promote greater awareness and understanding of CDG, to provide information and support to families affected by CDG, and to advocate for and fund scientific research to advance the diagnosis and treatment of CDG.
CDG Canada
CDG Canada supports patients and families affected by Congenital Disorders of Glycosylation (CDG).
Genetic Support Network of Victoria
The Genetic Support Network of Victoria is an organisation that supports people living with genetic, undiagnosed and rare conditions and those who support them including community and families, patient support organisations, health professionals and industry. Our vision is our community flourishing and living their best lives.
Heart of a Giant Foundation
The mission of the HGF is to achieve better health outcomes for heart diseases and related chronic health conditions in our communities and enhance the quality of life through health education, care support, and connection to community resources.
Louisiana Metabolic Disorders Coalition
We support, educate, and advocate for patients & families affected by metabolic disorders.
Mississippi Metabolics Foundation
Our mission at Mississippi Metabolics Foundation (MMF) is to advocate, educate, and support families in MS affected by genetic metabolic disorders/inborn errors of metabolism (IEM's). MMF promotes initiatives and further advancements in legislation, education, research, clinical trials, studies, therapies, targeted treatments, and eventual cures for IEM’s and all rare diseases.
Myhre Syndrome Foundation
We aim to safely bring the best possible treatments to the Myhre syndrome community. We’re building tools to test a wide range of therapies—from existing drugs to DNA repair.
RareDNA Foundation
Dedicated to improving outcomes for individuals and families affected by rare DNA heart mutations by advancing awareness, access and action. We increase awareness among medical professionals and the public, provide education and resources on diagnosis and treatment, support scientific research, and advocate for faster diagnostic pathways, giving families the knowledge and care they need.
The Chandler Project
The Chandler Project brings awareness and shines a light on transformative research surrounding achondroplasia and other skeletal dysplasias by offering support to a global community and network of patients, parents, and caregivers seeking information on scientific discoveries, pharmaceutical advancements and surgical treatment options.
Uganda Alliance of Patients Organization
Supporting patients to access quality, safe and patient-centered healthcare services.
Wave of Support, Inc
Empowering those affected by bleeding disorders and other rare disease through advocacy, resources, education, and support
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Clinical Trials
For a list of clinical trials in this disease area, please click here.