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CBL-related disorder is a genetic condition caused by pathogenic variants in the Cbl ubiquitin ligase gene, (CBL; HGNC:1541). Due to the proposed mechanism indicating the CBL gene's relationship to the RAS-MAPK pathway and the phenotypic presentation similar to that of the RASopathies, CBL-related disorder should be considered a RASopathy disorder. Though there is a wide spectrum of phenotypic variability, broadly, patients with CBL-related disorder have presented with developmental delay, intellectual disability, neurodevelopmental alterations, prenatal lymphatic anomalies, cardiac malformations as well as vascular anomalies particularly affecting the brain (e.g. Moya-moya arteriopathies), craniofacial features indicative of a RASopathy, hypotonia, feeding difficulties, edema of the legs, musculoskeletal and respiratory thorax abnormalities, ectodermal features including cafe-au-lait spots, immunological and hematological disorders and susceptibility to tumors diagnosed as juvenile myelomonocytic leukemia (JMML) that is usually self-remitting. Note tumor risk beyond JMML has not yet been thoroughly assessed. Due to the clinical presentation of a broad spectrum of these and other phenotypes in patients with variants in CBL, these conditions are currently defined by experts in reference to the causal gene, CBL.
Data assembled from 8 of 12 sources · Last updated Sep 20, 2026, 12:56 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about CBL-related disorder
Features include always present findings: Posteriorly rotated ears, Joint hypermobility, and Juvenile myelomonocytic leukemia; and common findings: Epicanthus, Cafe-au-lait spot, Thick vermilion border, and Hypertelorism and others. 48 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Heart and blood vessels | 3 | Aortic valve stenosis, Bicuspid aortic valve, Mitral regurgitation |
Growth and development | 3 | Short stature, Postnatal growth retardation, Failure to thrive |
Brain and nerves | 3 | Global developmental delay, Delayed speech and language development, Depressed nasal bridge |
Head and neck | 2 | Microcephaly, Triangular face |
Bones and joints | 2 | Joint hypermobility, Finger joint hypermobility |
Digestive system | 2 | Enlarged spleen (splenomegaly), Hepatosplenomegaly |
Muscles | 1 | Low muscle tone (hypotonia) |
Skin | 1 | Lymphedema |
Arms and legs | 1 | Finger joint hypermobility |
Blood and immune system | 1 | Enlarged spleen (splenomegaly) |
Eyes | 1 | Ptosis |
CBL encodes Cbl proto-oncogene (906 aa). E3 ubiquitin-protein ligase that acts as a negative regulator of many signaling pathways by mediating ubiquitination of cell surface receptors. Highest expression in Testis (28.9 TPM) and Cells EBV-transformed lymphocytes (28.6 TPM).
CBL-related disorder is caused by mutations in the CBL gene on chromosome 11.
The CBL protein participates in CBL E366_Q409del pathway.
CBL is classified as a druggable target (Clinically Actionable, Enzyme, and Kinase categories) with score 1.7.
Genetic testing for CBL is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for CBL-related disorder has been reported in the published literature.
Phenotype severity distribution: 3 always present features, 27 common features.
1 clinical trial registered, 1 recruiting. Interventions under study include drug therapy. Pipeline includes 1 PHASE1. Research is primarily sponsored by academic and government institutions.
13 publications have been identified in PubMed for CBL-related disorder. Research spans Case Report / Case Series (38%), Review / Meta-Analysis (31%), and Basic Science / Preclinical (23%).
Research Type | Count | % of Total |
|---|---|---|
Patient case studies | 5 | 38% |
Research summaries | 4 | 31% |
Laboratory research | 3 | 23% |
Testing and diagnosis research | 1 | 8% |
Monika F (2026). [PMID: 42193013](https://pubmed.ncbi.nlm.nih.gov/42193013/). *Cancers (Basel)*. [Review / Meta-Analysis]
Salvadores-Álvarez V (2026). [PMID: 41466533](https://pubmed.ncbi.nlm.nih.gov/41466533/). *Int J Lab Hematol*. [Case Report / Case Series]
Harrington CN (2026). [PMID: 41964119](https://pubmed.ncbi.nlm.nih.gov/41964119/). *Am J Med Genet A*. [Case Report / Case Series]
Lee JL (2025). [PMID: 40763015](https://pubmed.ncbi.nlm.nih.gov/40763015/). *Proc Natl Acad Sci U S A*. [Basic Science / Preclinical]
Al-Kuraishy HM (2025). [PMID: 39832667](https://pubmed.ncbi.nlm.nih.gov/39832667/). *Neuroscience*. [Review / Meta-Analysis]
Abramowicz S (2025). [PMID: 39604255](https://pubmed.ncbi.nlm.nih.gov/39604255/). *Eur J Ophthalmol*. [Case Report / Case Series]
Xu Y (2025). [PMID: 41517161](https://pubmed.ncbi.nlm.nih.gov/41517161/). *Foods*. [Basic Science / Preclinical]
Kim HY (2025). [PMID: 41221743](https://pubmed.ncbi.nlm.nih.gov/41221743/). *Clin Lab*. [Case Report / Case Series]
Chen Y (2024). [PMID: 38799203](https://pubmed.ncbi.nlm.nih.gov/38799203/). *Int J Gen Med*. [Diagnostic / Biomarker]
Mar K (2024). [PMID: 39076033](https://pubmed.ncbi.nlm.nih.gov/39076033/). *Pediatr Dermatol*. [Review / Meta-Analysis]
AI-curated news mentioning CBL-related disorder
Updated Aug 6, 2026
Regulators in Australia are providing hope to thousands of patients around the world that suffer from a rare genetic disease that currently has no approved treatment. Late last month, CAMP4 Therapeutics was given permission by Australia's top drug regulator to initiate a clinical trial for its ... Regulators in Australia are providing hope to thousands of patients around the world that suffer from a rare genetic disease that currently has no approved treatment. Late last month, CAMP4 Therapeutics was given permission by Australia's top drug regulator to initiate a clinical trial for its therapy designed to treat SYNGAP1-related disorders, a rare genetic disease marked by epilepsy and neurodevelopmental delays. CAMP4's trial will deploy a double-blind model, in which half the participants receiving the ASO - a process that involves a lumbar puncture to inject the medication directly into the cerebrospinal fluid - will be given a placebo. Administering placebos in clinical trials involving rare disease patients is sometimes seen as a controversial practice within that community, where patients who desperately need therapies often have very few approved treatment options. CAMP4 is preparing a Phase 1/2 trial of an experimental SYNGAP1 therapy, marking a major milestone for patients with the rare disease. Early results for CAMP4's ASO therapy have been promising. A preclinical study involving primates found the treatment increased protein expression in the brain, and a mouse model showed improved seizure measures. CNBC Cures' Becky Quick - whose daughter Kaylie was diagnosed with SYNGAP1 at age 2 - spoke with CAMP4's CEO, Josh Mandel-Brehm, and asked him about the trial's design and what it means for the thousands living with the devastating rare disease.
Among 19 additional patients with ... treatment to broader use in genetically compatible patients, the researchers said. Kim-McManus said funding and regulatory support are among the main challenges to expanding this approach to more patients in a broader clinical trial. She is working on tackling these obstacles in collaboration with nonprofit and other entities in the hopes of bringing genetic therapies to more patients with rare disease... Among 19 additional patients with SCN2A-related disorders identified through rapid whole-genome sequencing, three (16%) had a genetic configuration that could potentially be targeted by the ASO developed for the older patient, supporting a possible path from single-patient treatment to broader use in genetically compatible patients, the researchers said. Kim-McManus said funding and regulatory support are among the main challenges to expanding this approach to more patients in a broader clinical trial. She is working on tackling these obstacles in collaboration with nonprofit and other entities in the hopes of bringing genetic therapies to more patients with rare disease. Individualized gene therapies reduce seizures and lead to developmental gains in two boys with severe, treatment-resistant SCN2A-related epilepsy. Both therapies were well tolerated, with no treatment-related serious adverse events, abnormal laboratory findings, or clinically significant changes on ECG or EEG. The investigators said long-term follow-up is needed to determine the durability of the safety and efficacy findings. They also noted that some disease effects may be less reversible when treatment begins later, suggesting that early genetic diagnosis and intervention could maximize the benefit. The therapies were designed to reduce production of the disease-causing SCN2A transcript while preserving expression of the healthy copy of the gene. The ASOs were administered by intrathecal injection, with doses generally repeated every 2-3 months and adjusted according to the patients’ clinical response.