Kisho is an information platform, not a medical provider. Nothing on this site constitutes medical advice, diagnosis, or treatment recommendations. All content is aggregated from publicly available sources (including ClinicalTrials.gov, PubMed, FDA.gov, and Orphanet) and is provided for informational purposes only. Clinical trial eligibility, treatment decisions, and any health-related actions should always be discussed with a qualified healthcare professional. Kisho does not endorse any specific therapy, organization, or clinical trial. Terms of use · Privacy policy
Leprechaunism is a congenital form of extreme insulin resistance (a group of syndromes that also includes Rabson-Mensenhall syndrome, type A insulin-resistance syndrome, and acquired type B insulin-resistance syndrome) characterized by intrauterine and mainly postnatal severe growth retardation.
Features include always present findings: Coarse facial features, Thick vermilion border, Hypertrichosis, and Postnatal growth retardation and others; and common findings: Abdominal distention, Acanthosis nigricans, Rectal prolapse, and Recurrent otitis media and others. 52 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Digestive system | 6 | Abdominal distention, Cholestasis, Liver scarring (fibrosis) (hepatic fibrosis) |
INSR encodes insulin receptor (1,382 aa). Receptor tyrosine kinase which mediates the pleiotropic actions of insulin. Highest expression in Spleen (90.9 TPM) and Ovary (80.2 TPM).
Donohue syndrome is associated with mutations in the INSR gene on chromosome 19.
The INSR protein participates in BIN2(1-253)insRVSLGSILSVSS-PDGFRB(572-1106) fusion and p-12Y-BIN2(1-253)insRVSLGSILSVSS-PDGFRB(572-1106) fusion pathways.
INSR is classified as a druggable target (Clinically Actionable, Druggable Genome, Enzyme, External Side Of Plasma Membrane, Kinase, Transcription Factor, Transporter, and Tyrosine Kinase categories) with score 1.5.
INSR-related severe insulin resistance syndrome (INSR-SIRS) should be suspected in individuals with the following , , and findings of Donohue syndrome or Rabson-Mendenhall syndrome (RMS).
Clinical Findings
Donohue syndrome
Source: GeneReviews — "INSR-Related Severe Insulin Resistance Syndrome"
No approved treatments are currently available for Donohue syndrome. The disease remains an area of unmet medical need.
To establish the extent of disease and needs in an individual diagnosed with INSR-related severe insulin resistance syndrome (INSR-SIRS), the evaluations summarized (if not performed as part of the evaluation that led to the diagnosis) are recommended.
Table 4.
INSR-Related Severe Insulin Resistance Syndrome: Recommended Evaluations Following Initial Diagnosis
To monitor existing manifestations, the individual's response to supportive care, and the emergence of new manifestations, the evaluations summarized in are recommended [, , , ]. Table 6. INSR-Related Severe Insulin Resistance Syndrome: Recommended Surveillance
No clinical trials have been registered for Donohue syndrome.
11 publications have been identified in PubMed for Donohue syndrome. Research spans Case Report / Case Series (64%), Other (9%), and Review / Meta-Analysis (9%).
Research Type | Count | % of Total |
|---|---|---|
Patient case studies | 7 | 64% |
Data assembled from 7 of 12 sources · Last updated Sep 19, 2026, 12:50 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about Donohue syndrome
Head and neck | 3 | Coarse facial features, Thick lower lip vermilion, Small face |
Growth and development | 3 | Postnatal growth retardation, Failure to thrive, Intrauterine growth retardation |
Arms and legs | 2 | Large hands, Long foot |
Bones and joints | 2 | Skeletal muscle atrophy, Delayed skeletal maturation |
Skin | 2 | Thickened, rough skin (hyperkeratosis), Nail dysplasia |
Kidneys and urinary system | 2 | Medullary nephrocalcinosis, Enlarged kidney |
Blood and immune system | 2 | Recurrent infections, Enlarged spleen (splenomegaly) |
Heart and blood vessels | 2 | Thickened heart muscle (hypertrophic cardiomyopathy), Thickened left heart wall (left ventricular hypertrophy) |
Muscles | 1 | Skeletal muscle atrophy |
Lab test results | 1 | Conjugated hyperbilirubinemia |
Ears | 1 | Recurrent otitis media |
Hormones | 1 | Precocious puberty |
INSR-related severe insulin resistance syndrome (INSR-SIRS) comprises a phenotypic continuum from the severe phenotype of Donohue syndrome to the milder phenotype of Rabson-Mendenhall syndrome (RMS). To date, fewer than 100 individuals have been identified with INSR-SIRS . The following description of the phenotypic features associated with this condition is based on these reports. Table 2. INSR-Related Severe Insulin Resistance Syndrome: Comparison of Phenotypes by Select Features
Feature | Donohue Syndrome | Rabson-Mendenhall Syndrome |
|---|---|---|
Hyperinsulinism | 100% | 100% |
Diabetic ketoacidosis | + | 100% |
Genital enlargement | + | 100% |
Hypothyroidism | + | 50% Growth |
Intrauterine growth deficiency | 100% | + |
Postnatal growth deficiency | 100% | 60%-80% Neurologic |
Hypotonia | 100% | + |
Developmental delay | 100% | 100% |
Intellectual disability | 100% | 50% |
Dysmorphic facial features | 100% | 100% |
Integument abnormalities | 100% | 100% |
Organomegaly | 100% | 60%-80% |
Rectal hypertrophy /or prolapse | 100% | + Based on , , , , , , , + = reported feature; incidence unknown Donohue syndrome is characterized by severe insulin resistance, growth failure, hypotonia, developmental delay, characteristic facies, and organomegaly. Endocrine manifestations. |
Source: GeneReviews — "INSR-Related Severe Insulin Resistance Syndrome"
There are no known genotype-phenotype correlations in INSR-SIRS.
Source: GeneReviews — "INSR-Related Severe Insulin Resistance Syndrome"
The differential diagnosis of INSR-related severe insulin resistance syndrome (INSR-SIRS) includes many rare disorders with hirsutism, severe growth deficiency, and developmental delay with other syndromic features, some of which are summarized in . Table 3. Selected Disorders of Interest in the Differential Diagnosis of INSR-Related Severe Insulin Resistance Syndrome
Gene(s)/ Genetic Mechanism | Disorder | MOI | Clinical Features of Disorder |
|---|---|---|---|
Overlapping w/INSR-SIRS | Distinguishing from INSR-SIRS 11p15.5 hypomethylation,maternal UPD7, other causes1 | Silver-Russell syndrome (SRS) | See footnote 1. |
UCP2 | Familial hyperinsulinism (FHI) | ADAR | Congenital hyperinsulinemia; Hypoglycemia (ranging from severe neonatal-onset disease to childhood-onset disease w/mild symptoms in FHI)3 |
Insulin levels are usually much higher in DS/RMS. AGPAT2BSCL2CAV1CAVIN1 (PTRF) | Berardinelli-Seip congenital lipodystrophy (BSCL) (OMIM PS608594) | AR | Congenital hyperinsulinemia; Insulin resistance4; Hepatomegaly (due to hepatic steatosis skeletal muscle hypertrophy in BSCL); Hypertrophic cardiomyopathy5 |
IGF1R | Resistance to insulin-like growth factor 1 (OMIM 270450) | ARAD | IUGR postnatal growth deficiency; Mildly impaired glucose tolerance6; Delayed psychomotor development; Mild dysmorphic features |
Source: GeneReviews — "INSR-Related Severe Insulin Resistance Syndrome"
Genetic testing for INSR is available. Testing is considered confirmatory for diagnosis.
System/Concern | Evaluation | Comment
| • Assessment by pediatric endocrinologist
Blood glucose monitoring (during fasting after feeding) or continuous glucose monitoring
Measurement of insulin C-peptide levels
Thyroid function tests
Ovarian ultrasound (in females)
|
| Assessment by nutritionist | To assess feeding diet required to achieve normal glucose levels optimal growth
| Developmental assessment |
| • Eval by pediatric cardiologist
Echocardiography
Cardiac MRI if indicated
| • To assess for hypertrophic cardiomyopathy
Note: Novel blood biomarkers incl BNP, NT-proBNP, hs-CRP, hs-cTnT, uric acid are currently being evaluated.
| • Eval by pediatric nephrologist
Serum electrolytes
24-hour urinary calcium
Renal ultrasound
| To assess for abnormal renin-aldosterone system for nephrocalcinosis
| • Liver function tests per gastroenterologist
Abdominal ultrasound to assess liver/spleen
Eval by pediatric gastroenterologist
| To assess for cholestatic liver disease
Assess for rectal prolapse. |
| Consider eval by oral maxillofacial sp...
Source: GeneReviews — "INSR-Related Severe Insulin Resistance Syndrome"
In individuals with Donohue syndrome, avoid the following:
Agents that cause hypoglycemia
Prolonged fasting
Contact with persons with a contagious disease
In individuals with RMS, avoid the following:
Agents that cause hyperglycemia
High-carbohydrate diet
Contact with persons with a contagious disease
Source: GeneReviews — "INSR-Related Severe Insulin Resistance Syndrome"
There are no controlled trials in INSR-SIRS; thus, the two therapies discussed in this section are for individuals with INSR pathogenic variants based on clinical experience, case series, and expert opinion.
The rationale for using rhIGF-1 to treat severe insulin resistance syndromes is based on observations of its direct effects on carbohydrate metabolism. In humans, infusion of rhIGF-1 suppresses hepatic glucose production, stimulates peripheral glucose uptake in muscle, and – despite a significant reduction in circulating insulin levels – causes hypoglycemia. The insulin-like growth factor 1 receptor (IGF1R) and the insulin receptor (INSR) share 60% homology and very similar intracellular activity . Treatment regimen.
Source: GeneReviews — "INSR-Related Severe Insulin Resistance Syndrome"
View trials for Donohue syndrome
Evaluation |
|---|
Frequency |
|---|
Endocrine | Capillary glucose levels | During fasting after feeding or when clinically indicated; or continuous glucose monitoring; HbA1c; Insulin C-peptide levels |
Growth | Nutrition growth assessment | At each visit |
Development | Assess psychomotor development. | Every 3 mos |
Immune function | Assess for recurrent infections. | At each visit Cardiac |
Malignancies | Gynecologic eval to assess for endometrial cancer | In those w/abnormal vaginal bleeding HbA1c = glycosylated hemoglobin |
Source: GeneReviews — "INSR-Related Severe Insulin Resistance Syndrome"
Phenotype severity distribution: 21 always present features, 7 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
1 |
9% |
Research summaries | 1 | 9% |
Clinical study results | 1 | 9% |
Disease patterns and progression | 1 | 9% |
Improda N (2026). [PMID: 41606799](https://pubmed.ncbi.nlm.nih.gov/41606799/). *The Journal of clinical endocrinology and metabolism*. [Clinical Trial Publication]
Marcelino do Nascimento R (2026). [PMID: 42181197](https://pubmed.ncbi.nlm.nih.gov/42181197/). *Front Endocrinol (Lausanne)*. [Other]
Yakine F (2026). [PMID: 41769619](https://pubmed.ncbi.nlm.nih.gov/41769619/). *Cureus*. [Case Report / Case Series]
Almazán Monroy JD (2025). [PMID: 41025026](https://pubmed.ncbi.nlm.nih.gov/41025026/). *Oxford medical case reports*. [Case Report / Case Series]
Collin-Chavagnac D (2025). [PMID: 40094207](https://pubmed.ncbi.nlm.nih.gov/40094207/). *Genetics in medicine : official journal of the American College of Medical Genetics*. [Epidemiology / Natural History]
Wang JL (2025). [PMID: 40962551](https://pubmed.ncbi.nlm.nih.gov/40962551/). *Zhonghua er ke za zhi = Chinese journal of pediatrics*. [Case Report / Case Series]
Chrzanowska J (2025). [PMID: 40241988](https://pubmed.ncbi.nlm.nih.gov/40241988/). *Frontiers in endocrinology*. [Case Report / Case Series]
Yuan X (2025). [PMID: 40499531](https://pubmed.ncbi.nlm.nih.gov/40499531/). *American journal of physiology. Endocrinology and metabolism*. [Case Report / Case Series]
Poon SWY (2025). [PMID: 37074094](https://pubmed.ncbi.nlm.nih.gov/37074094/). *Journal of clinical research in pediatric endocrinology*. [Case Report / Case Series]
Globa E (2024). [PMID: 39741883](https://pubmed.ncbi.nlm.nih.gov/39741883/). *Frontiers in endocrinology*. [Review / Meta-Analysis]