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Congenital dyserythropoietic anemia type II (CDA II) is the most common form of CDA characterized by anemia, jaundice and splenomegaly and often leading to liver iron overload and gallstones.
Features include common findings: Increased immature red blood cells (reticulocytosis). 7 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Digestive system | 3 | Cholelithiasis, Jaundice, Enlarged spleen (splenomegaly) |
Blood and immune system | 3 | Anemia of inadequate production, Increased immature red blood cells (reticulocytosis), Enlarged spleen (splenomegaly) |
Bones and joints | 1 | Endopolyploidy on chromosome studies of bone marrow |
Prenatal/birth | 1 | Anemia of inadequate production |
SEC23B function has not been fully characterized.
Congenital dyserythropoietic anemia type 2 is caused by mutations in the SEC23B gene on chromosome 20.
Genetic testing for SEC23B is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for congenital dyserythropoietic anemia type 2 has been reported in the published literature.
Phenotype severity distribution: 1 common feature.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for congenital dyserythropoietic anemia type 2.
133 publications have been identified in PubMed for congenital dyserythropoietic anemia type 2. Research spans Basic Science / Preclinical (33%), Review / Meta-Analysis (22%), and Case Report / Case Series (13%).
Research Type | Count | % of Total |
|---|---|---|
Laboratory research | 44 | 33% |
Research summaries | 29 | 22% |
Patient case studies | 17 | 13% |
Disease patterns and progression | 16 | 12% |
Clinical study results | 15 | 11% |
Other research | 4 | 3% |
Testing and diagnosis research | 4 | 3% |
New treatment approaches | 4 | 3% |
Unknown (2026). [PMID: 42160641](https://pubmed.ncbi.nlm.nih.gov/42160641/). *Unknown Journal*. [Review / Meta-Analysis]
Gohary AE (2026). [PMID: 42149207](https://pubmed.ncbi.nlm.nih.gov/42149207/). *Pediatr Nephrol*. [Case Report / Case Series]
Unknown (2026). [PMID: 42118871](https://pubmed.ncbi.nlm.nih.gov/42118871/). *Unknown Journal*. [Review / Meta-Analysis]
Zhuang T (2026). [PMID: 41258833](https://pubmed.ncbi.nlm.nih.gov/41258833/). *The Journal of hand surgery*. [Review / Meta-Analysis]
Black SKP (2026). [PMID: 41634173](https://pubmed.ncbi.nlm.nih.gov/41634173/). *Diabetologia*. [Case Report / Case Series]
Hogan MF (2026). [PMID: 42159696](https://pubmed.ncbi.nlm.nih.gov/42159696/). *Diabetologia*. [Basic Science / Preclinical]
Amarasingha D (2026). [PMID: 41857086](https://pubmed.ncbi.nlm.nih.gov/41857086/). *Sci Rep*. [Epidemiology / Natural History]
Yu L (2026). [PMID: 41880517](https://pubmed.ncbi.nlm.nih.gov/41880517/). *Sci Transl Med*. [Basic Science / Preclinical]
Unknown (2026). [PMID: 42150011](https://pubmed.ncbi.nlm.nih.gov/42150011/). *Unknown Journal*. [Review / Meta-Analysis]
Ehrlich AM (2026). [PMID: 41549724](https://pubmed.ncbi.nlm.nih.gov/41549724/). *Spine*. [Basic Science / Preclinical]
Data assembled from 7 of 12 sources · Last updated Sep 20, 2026, 6:22 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center