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Fucosidosis is an extremely rare lysosomal storage disorder characterized by a highly variable phenotype with common manifestations including neurologic deterioration, coarse facial features, growth retardation, and recurrent sinopulmonary infections, as well as seizures, visceromegaly, angiokeratoma and dysostosis.
Features include always present findings: Hemiplegia, Angiokeratoma, Dystonia, and Short stature and others; and very common findings: Hearing loss (hearing impairment), Coarse facial features, Prominent forehead, and Global developmental delay and others. 81 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 15 | Hemiplegia, Dystonia, Seizure |
FUCA1 encodes alpha-L-fucosidase 1 (466 aa). Alpha-L-fucosidase is responsible for hydrolyzing the alpha-1,6-linked fucose joined to the reducing-end N-acetylglucosamine of the carbohydrate moieties of glycoproteins Highest expression in Thyroid (78.1 TPM) and Small Intestine Terminal Ileum (74.4 TPM).
Fucosidosis is caused by mutations in the FUCA1 gene on chromosome 1.
The FUCA1 protein participates in FUCA1 hydrolyses NGP:1,6-GlcNAc pathway.
FUCA1 is classified as a druggable target (Druggable Genome and Enzyme categories) with score 0.0.
Genetic testing for FUCA1 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for fucosidosis has been reported in the published literature.
Phenotype severity distribution: 24 always present features, 17 very common features, 9 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
2 clinical trials registered, 1 recruiting. Interventions under study include drug therapy, other interventions, and biologic therapy. Pipeline includes 1 PHASE2. Research is sponsored by a mix of industry and academic institutions.
177 publications have been identified in PubMed for fucosidosis. Research spans Basic Science / Preclinical (40%), Review / Meta-Analysis (32%), and Epidemiology / Natural History (15%).
Research Type | Count | % of Total |
|---|---|---|
Laboratory research | 70 |
Data assembled from 8 of 12 sources · Last updated Oct 3, 2026, 5:08 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Skin |
7 |
Angiokeratoma, Dry skin, Anhidrosis |
Bones and joints | 7 | Excessive inward curve of the lower back (lumbar hyperlordosis), Beaking of vertebral bodies, Anterior beaking of lumbar vertebrae |
Muscles | 6 | Flexion contracture, Low muscle tone (hypotonia), Muscle weakness |
Eyes | 3 | Cherry red spot of the macula, Tortuosity of conjunctival vessels, Cloudy or opaque cornea (corneal opacity) |
Head and neck | 3 | Coarse facial features, Thick lower lip vermilion, Abnormal facial shape |
Growth and development | 2 | Short stature, Failure to thrive |
Digestive system | 2 | Enlarged liver (hepatomegaly), Enlarged spleen (splenomegaly) |
Blood and immune system | 2 | Enlarged spleen (splenomegaly), Recurrent respiratory infections |
Heart and blood vessels | 2 | Enlarged heart (cardiomegaly), Abnormality of the cardiovascular system |
Ears | 1 | Hearing loss (hearing impairment) |
Lungs and breathing | 1 | Recurrent respiratory infections |
Hormones | 1 | Hypothyroidism |
Research summaries | 56 | 32% |
Disease patterns and progression | 27 | 15% |
Patient case studies | 7 | 4% |
Testing and diagnosis research | 6 | 3% |
Clinical study results | 6 | 3% |
New treatment approaches | 3 | 2% |
Other research | 2 | 1% |
Bäumges H (2026). [PMID: 41200823](https://pubmed.ncbi.nlm.nih.gov/41200823/). *Disease models & mechanisms*. [Basic Science / Preclinical]
Huang Y (2026). [PMID: 41774494](https://pubmed.ncbi.nlm.nih.gov/41774494/). *J Clin Invest*. [Clinical Trial Publication]
Sun M (2026). [PMID: 41217429](https://pubmed.ncbi.nlm.nih.gov/41217429/). *J Pathol*. [Epidemiology / Natural History]
Iglesias P (2026). [PMID: 41904647](https://pubmed.ncbi.nlm.nih.gov/41904647/). *Expert Rev Cardiovasc Ther*. [Review / Meta-Analysis]
Datta Mitra A (2026). [PMID: 41754181](https://pubmed.ncbi.nlm.nih.gov/41754181/). *Nutrients*. [Review / Meta-Analysis]
Kameshwara SU (2026). [PMID: 41773367](https://pubmed.ncbi.nlm.nih.gov/41773367/). *Clin Ter*. [Epidemiology / Natural History]
Can M (2026). [PMID: 41762773](https://pubmed.ncbi.nlm.nih.gov/41762773/). *Arch Biochem Biophys*. [Review / Meta-Analysis]
Ronen S (2026). [PMID: 41558995](https://pubmed.ncbi.nlm.nih.gov/41558995/). *Am J Surg Pathol*. [Basic Science / Preclinical]
Casazza K (2026). [PMID: 42008923](https://pubmed.ncbi.nlm.nih.gov/42008923/). *Mol Genet Metab*. [Review / Meta-Analysis]
Sauer AK (2026). [PMID: 41671724](https://pubmed.ncbi.nlm.nih.gov/41671724/). *Clinical nutrition (Edinburgh, Scotland)*. [Basic Science / Preclinical]