Congenital Dyserythropoietic Anemia (CDA)NCT02964494
The Congenital Dyserythropoietic Anemia Registry (CDAR)
An observational study of Congenital Dyserythropoietic Anemia (CDA), run by Children's Hospital Medical Center, Cincinnati at 1 site in United States.
Trial summary
The investigators have created and maintain a comprehensive registry for patients with the diagnosis of Congenital Dyserythropoietic Anemia (CDA) in North America. The goal of this registry is to collect long-term confidential data on patients with CDA in the US, Canada, and Mexico and maintain a bio-repository of… Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Congenital Dyserythropoietic Anemia (CDA)
- How many people
- 10,000 participants
- Where
- 1 siteUnited States
- Study dates
- 29 Aug 2016to Jan 2031
- How long will I take part?
- 15 Years
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Study population: Congenital Dyserythropoietic Anemia (CDA)
Who may be able to join
- Diagnosis of Congenital Dyserythropoietic Anemia (CDA), whether a genetic mutation is identified or not
- Evidence of congenital anemia/jaundice or a positive family history
- Evidence of ineffective erythropoiesis
- Typical morphological appearance of bone marrow erythroblasts
- All ages (ages 0-99)
Who cannot join
- Diagnosis of cancer
- Myelodysplasia
- Secondary dyserythropoiesis: e.g.; vitamin B12 deficiency or drug-related.
- Note1: Patients with rare band 3 (SLC4A1) mutations recently described to be associated with dyserythropoiesis will be eligible since the mechanisms appear to involve direct participation of band 3 in the erythroblast mitosis and cytokinesis.
- Note2: Siblings, parents, and family members of patients with confirmed CDA diagnosis are encouraged to participate in the study.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Hotline contact
United States1 site, 1 recruiting
- Recruiting
Cincinnati Children's Hospital Medical Center
Cincinnati, Ohio, 45229
Hotline, 513-636-6770, theodosia.kalfa@cchmc.org
Theodosia Kalfa, MD, PhD
About this study
The investigators have created and maintain a comprehensive registry for patients with the diagnosis of Congenital Dyserythropoietic Anemia (CDA) in North America. The goal of this registry is to collect long-term confidential data on patients with CDA in the US, Canada, and Mexico and maintain a bio-repository of de-identified patient blood and bone marrow specimens as a tool for the investigation of epidemiology, natural history, biology, and molecular pathogenetic mechanisms of CDA.
Read the detailed description
We have established and maintain a CDA registry (CDAR): a comprehensive registry of subjects with the diagnosis of any type of congenital dyserythropoietic anemia in North America. Subjects and their physicians have expressed interest in participating in a national/international registry that could promote research and further understanding of this rare disease-group.
CDAs consist a heterogeneous group of rare genetic disorders causing ineffective erythropoiesis with the characteristic finding of multinuclear erythroid precursors in the bone marrow. The other hematopoietic lineages seem unaffected. The diagnosis of CDA is clinically challenging and is based on identifying the characteristic morphology of erythroblasts in the bone marrow of subjects presenting with chronic anemia, frequently with evidence of hemolysis but suboptimal reticulocytosis, and iron overload. Three types are well-defined by marrow morphology, although a recent classification recognizes seven different genetic types. Since certain gene defects were identified in the different types of CDAs, our understanding of the biology and pathogenesis of these diseases has been improving. However, many gaps still exist in our understanding of the related molecular mechanisms primarily due to the rarity of the disease and the lack of systematic approach to study these subjects. In addition, the heterogeneity observed among subjects and the clinical overlap with other hematologic disorders, namely hemolytic anemias with brisk erythropoietic response that may be associated with erythroid dysplasia, and with ineffective erythropoiesis, further complicates the diagnosis and often delays appropriate diagnosis and therapy.
The purpose of CDAR is to maintain a database and bio-repository for patients with CDA and their families in order to systematically study this rare disease-group. Data regarding these subjects are collected confidentially at initial presentation or diagnosis and periodically thereafter over a long period of time (>15 years). In addition, blood, bone marrow (only if that procedure is clinically indicated based on the primary hematologist's decision) and/or DNA samples of enrolled subjects are stored for research studies with the aim to improve our understanding, diagnosis, and treatment of CDA.
The study continues recruiting.
- Medical subject headings
- Anemia, Dyserythropoietic, Congenital
What is being measured
The primary outcome is the main question the study is designed to answer.
Age and symptoms at presentation and/or diagnosis
Clinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Measured: From study entry to >15 years
Degree of anemia
Clinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Measured: From study entry to >15 years
Clinical course during
infancyClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Measured: From study entry to >15 years
Growth and development, endocrinologic evaluation, skeletal
dysplasiasClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Measured: From study entry to >15 years
Transfusion requirements
requirementsClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Measured: From study entry to >15 years
Evidence and complications of hemolysis and of extramedullary
erythropoiesisClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Measured: From study entry to >15 years
Iron overload, frequency and methods of monitoring, iron chelators, effectiveness and history of side effects if
usedClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Measured: From study entry to >15 years
Splenomegaly, history of splenectomy and effect if performed; possible complications, e.g. thrombosis or
sepsisClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Measured: From study entry to >15 years
History of stem cell transplant, effect, complications
Clinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Measured: From study entry to >15 years
Other medications, e.g. interferon A for CDA-I, effect on anemia and on transfusion frequency, any side effects
notedClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Measured: From study entry to >15 years
Ethnic background and demographic information will also be collected for epidemiologic studies
Clinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Measured: From study entry to >15 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted16 Nov 2016 (estimated)
- Study start29 Aug 2016
- Primary completionJul 2026 (estimated)
- Study completionJan 2031 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (8)Papers the sponsor has linked to this study.
- Other trials for Congenital Dyserythropoietic Anemia (CDA)Studies of the same condition, open and under way.
- More trials run by Children's Hospital Medical Center, CincinnatiThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Other
- Time perspective
- Other
- Enrolment
- 10,000 participants (estimated)
- Target duration
- 15 Years
Sponsor and investigators
- Lead sponsor
- Children's Hospital Medical Center, Cincinnati
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Theodosia Kalfa, MD, PhD, Principal investigator, Children's Hospital Medical Center, Cincinnati
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02964494
- Sponsor's protocol ID
- 2016-2727_CDAR
- Status last verified
- Jun 2026
- First submitted
- 4 Oct 2016
- Last updated
- 16 Jun 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: Data regarding subjects that meet inclusion will be collected confidentially at initial presentation or diagnosis and periodically thereafter over a long period of time (\>15 years). In addition, blood, bone marrow and/or DNA samples of enrolled subjects will be stored for research studies with the aim to improve diagnosis, treatment and care of CDA. The samples and medical information (that is not associated with a patient's name) may be used by other researchers studying CDA, at Cincinnati Children's Hospital Medical Center or at other institutions. The researchers must get Institutional Review Board (a board that is in charge of regulating research done on people) approval prior to requesting data and/or samples from this repository if applicable. No identifying information (that associates the medical information with the subject or sample) will be available to them.
Publications
Seu KG, Trump LR, Emberesh S, Lorsbach RB, Johnson C, Meznarich J, Underhill HR, Chou ST, Sakthivel H, Nassar NN, Seu KJ, Blanc L, Zhang W, Lutzko CM, Kalfa TA. VPS4A Mutations in Humans Cause Syndromic Congenital Dyserythropoietic Anemia due to Cytokinesis and Trafficking Defects. Am J Hum Genet. 2020 Dec 3;107(6):1149-1156. doi: 10.1016/j.ajhg.2020.10.013. Epub 2020 Nov 12.
PubMed 33186543Boucher AA, Dayton VJ, Pratt AR, Nassar NN, Elgammal Y, Kalfa TA. Three-generation female cohort with macrocytic anemia and iron overload. Am J Hematol. 2025 Jan;100(1):133-138. doi: 10.1002/ajh.27489. Epub 2024 Sep 27. No abstract available.
PubMed 39329459Hernandez G, Romero-Cortadellas L, Ferrer-Cortes X, Venturi V, Dessy-Rodriguez M, Olivella M, Husami A, De Soto CP, Morales-Camacho RM, Villegas A, Gonzalez-Fernandez FA, Morado M, Kalfa TA, Quintana-Bustamante O, Perez-Montero S, Tornador C, Segovia JC, Sanchez M. Mutations in the RACGAP1 gene cause autosomal recessive congenital dyserythropoietic anemia type III. Haematologica. 2023 Feb 1;108(2):581-587. doi: 10.3324/haematol.2022.281277. No abstract available.
PubMed 36200420Yenwongfai LN, Arora R, Smith AP, Kalfa T, Husami A, Radulescu V, Myers K, Lorsbach R. Pediatric myelofibrosis due to compound heterozygous MPIG6B mutations in a patient of European ancestry. Pediatr Blood Cancer. 2023 Mar;70(3):e30023. doi: 10.1002/pbc.30023. Epub 2022 Oct 2. No abstract available.
PubMed 36184776Harms FL, Rexach JE, Efthymiou S, Aynekin B, Per H, Gulec A, Nampoothiri S, Sampaio H, Sachdev R, Stoeva R, Myers K, Pena LDM, Kalfa TA, Chard M, Klassen M, Pries M, Kutsche K. Loss of TBC1D2B causes a progressive neurological disorder with gingival overgrowth. Eur J Hum Genet. 2024 May;32(5):558-566. doi: 10.1038/s41431-024-01563-5. Epub 2024 Feb 19.
PubMed 38374468Niss O, Lorsbach RB, Berger M, Chonat S, McLemore M, Buchbinder D, McCavit T, Shaffer LG, Simpson J, Schwartz JH, Meznarich J, Emberesh M, Seu KG, Zhang W, Kalfa TA; CDAR consortium. Congenital dyserythropoietic anemia type I: First report from the Congenital Dyserythropoietic Anemia Registry of North America (CDAR). Blood Cells Mol Dis. 2021 Mar;87:102534. doi: 10.1016/j.bcmd.2020.102534. Epub 2020 Dec 24.
PubMed 33401150Elgammal Y, Zhang W, Kalfa TA. Molecular surprises in evaluations of red cell disorders. Hematology Am Soc Hematol Educ Program. 2025 Dec 5;2025(1):370-376. doi: 10.1182/hematology.2025000726.
PubMed 41347995Kim S, Khoriaty R, Li L, McClune M, Kalfa TA, Wu J, Peltier D, Fujiwara H, Sun Y, Oravecz-Wilson K, King RA, Ginsburg D, Reddy P. ER-to-Golgi transport and SEC23-dependent COPII vesicles regulate T cell alloimmunity. J Clin Invest. 2021 Jan 19;131(2):e136574. doi: 10.1172/JCI136574.
PubMed 33463537
Study at a glance
From the registry record, last updated by the sponsor on 16 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Congenital Dyserythropoietic Anemia Registry (CDAR)
- ClinicalTrials.gov ID
- NCT02964494
- Acronym / sponsor ID
- 2016-2727_CDAR
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 10,000 participants (estimated)
- Lead sponsor
- Children's Hospital Medical Center, CincinnatiUniversity, hospital or other
- Study start
- 29 Aug 2016 (actual)
- Primary completion
- Jul 2026 (estimated)
- Study completion
- Jan 2031 (estimated)
- First posted
- 16 Nov 2016 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The investigators have created and maintain a comprehensive registry for patients with the diagnosis of Congenital Dyserythropoietic Anemia (CDA) in North America. The goal of this registry is to collect long-term confidential data on patients with CDA in the US, Canada, and Mexico and maintain a bio-repository of de-identified patient blood and bone marrow specimens as a tool for the investigation of epidemiology, natural history, biology, and molecular pathogenetic mechanisms of CDA.
Detailed description
We have established and maintain a CDA registry (CDAR): a comprehensive registry of subjects with the diagnosis of any type of congenital dyserythropoietic anemia in North America. Subjects and their physicians have expressed interest in participating in a national/international registry that could promote research and further understanding of this rare disease-group.
CDAs consist a heterogeneous group of rare genetic disorders causing ineffective erythropoiesis with the characteristic finding of multinuclear erythroid precursors in the bone marrow. The other hematopoietic lineages seem unaffected. The diagnosis of CDA is clinically challenging and is based on identifying the characteristic morphology of erythroblasts in the bone marrow of subjects presenting with chronic anemia, frequently with evidence of hemolysis but suboptimal reticulocytosis, and iron overload. Three types are well-defined by marrow morphology, although a recent classification recognizes seven different genetic types. Since certain gene defects were identified in the different types of CDAs, our understanding of the biology and pathogenesis of these diseases has been improving. However, many gaps still exist in our understanding of the related molecular mechanisms primarily due to the rarity of the disease and the lack of systematic approach to study these subjects. In addition, the heterogeneity observed among subjects and the clinical overlap with other hematologic disorders, namely hemolytic anemias with brisk erythropoietic response that may be associated with erythroid dysplasia, and with ineffective erythropoiesis, further complicates the diagnosis and often delays appropriate diagnosis and therapy.
The purpose of CDAR is to maintain a database and bio-repository for patients with CDA and their families in order to systematically study this rare disease-group. Data regarding these subjects are collected confidentially at initial presentation or diagnosis and periodically thereafter over a long period of time (>15 years). In addition, blood, bone marrow (only if that procedure is clinically indicated based on the primary hematologist's decision) and/or DNA samples of enrolled subjects are stored for research studies with the aim to improve our understanding, diagnosis, and treatment of CDA.
The study continues recruiting.
Study design
- Observational model
- Other
- Time perspective
- Other
- Target follow-up
- 15 Years
Who may qualify
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Congenital Dyserythropoietic Anemia (CDA)
Key inclusion criteria (5 listed)
- Diagnosis of Congenital Dyserythropoietic Anemia (CDA), whether a genetic mutation is identified or not
- Evidence of congenital anemia/jaundice or a positive family history
- Evidence of ineffective erythropoiesis
- Typical morphological appearance of bone marrow erythroblasts
- All ages (ages 0-99)
Key exclusion criteria (5 listed)
- Diagnosis of cancer
- Myelodysplasia
- Secondary dyserythropoiesis: e.g.; vitamin B12 deficiency or drug-related.
- Note1: Patients with rare band 3 (SLC4A1) mutations recently described to be associated with dyserythropoiesis will be eligible since the mechanisms appear to involve direct participation of band 3 in the erythroblast mitosis and cytokinesis.
- Note2: Siblings, parents, and family members of patients with confirmed CDA diagnosis are encouraged to participate in the study.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Age and symptoms at presentation and/or diagnosis
Time frame: From study entry to >15 years
Clinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Degree of anemia
Time frame: From study entry to >15 years
Clinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Clinical course during
Time frame: From study entry to >15 years
infancyClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Growth and development, endocrinologic evaluation, skeletal
Time frame: From study entry to >15 years
dysplasiasClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Transfusion requirements
Time frame: From study entry to >15 years
requirementsClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Evidence and complications of hemolysis and of extramedullary
Time frame: From study entry to >15 years
erythropoiesisClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Iron overload, frequency and methods of monitoring, iron chelators, effectiveness and history of side effects if
Time frame: From study entry to >15 years
usedClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Splenomegaly, history of splenectomy and effect if performed; possible complications, e.g. thrombosis or
Time frame: From study entry to >15 years
sepsisClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
History of stem cell transplant, effect, complications
Time frame: From study entry to >15 years
Clinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Other medications, e.g. interferon A for CDA-I, effect on anemia and on transfusion frequency, any side effects
Time frame: From study entry to >15 years
notedClinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Ethnic background and demographic information will also be collected for epidemiologic studies
Time frame: From study entry to >15 years
Clinical and laboratory information will be collected by the patient and the referring physician with questionnaires in order to obtain the natural history of the disease, including correlations, epidemiology, and biology of the different types of CDA.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 16 Jun 2026.
- Background: PubMed 33186543Seu KG, Trump LR, Emberesh S, Lorsbach RB, Johnson C, Meznarich J, Underhill HR, Chou ST, Sakthivel H, Nassar NN, Seu KJ, Blanc L, Zhang W, Lutzko CM, Kalfa TA. VPS4A Mutations in Humans Cause Syndromic Congenital Dyserythropoietic Anemia due to Cytokinesis and Trafficking Defects. Am J Hum Genet. 2020 Dec 3;107(6):1149-1156. doi: 10.1016/j.ajhg.2020.10.013. Epub 2020 Nov 12.
- Background: PubMed 39329459Boucher AA, Dayton VJ, Pratt AR, Nassar NN, Elgammal Y, Kalfa TA. Three-generation female cohort with macrocytic anemia and iron overload. Am J Hematol. 2025 Jan;100(1):133-138. doi: 10.1002/ajh.27489. Epub 2024 Sep 27. No abstract available.
- Background: PubMed 36200420Hernandez G, Romero-Cortadellas L, Ferrer-Cortes X, Venturi V, Dessy-Rodriguez M, Olivella M, Husami A, De Soto CP, Morales-Camacho RM, Villegas A, Gonzalez-Fernandez FA, Morado M, Kalfa TA, Quintana-Bustamante O, Perez-Montero S, Tornador C, Segovia JC, Sanchez M. Mutations in the RACGAP1 gene cause autosomal recessive congenital dyserythropoietic anemia type III. Haematologica. 2023 Feb 1;108(2):581-587. doi: 10.3324/haematol.2022.281277. No abstract available.
- Background: PubMed 36184776Yenwongfai LN, Arora R, Smith AP, Kalfa T, Husami A, Radulescu V, Myers K, Lorsbach R. Pediatric myelofibrosis due to compound heterozygous MPIG6B mutations in a patient of European ancestry. Pediatr Blood Cancer. 2023 Mar;70(3):e30023. doi: 10.1002/pbc.30023. Epub 2022 Oct 2. No abstract available.
- Background: PubMed 38374468Harms FL, Rexach JE, Efthymiou S, Aynekin B, Per H, Gulec A, Nampoothiri S, Sampaio H, Sachdev R, Stoeva R, Myers K, Pena LDM, Kalfa TA, Chard M, Klassen M, Pries M, Kutsche K. Loss of TBC1D2B causes a progressive neurological disorder with gingival overgrowth. Eur J Hum Genet. 2024 May;32(5):558-566. doi: 10.1038/s41431-024-01563-5. Epub 2024 Feb 19.
- Results publication: PubMed 33401150Niss O, Lorsbach RB, Berger M, Chonat S, McLemore M, Buchbinder D, McCavit T, Shaffer LG, Simpson J, Schwartz JH, Meznarich J, Emberesh M, Seu KG, Zhang W, Kalfa TA; CDAR consortium. Congenital dyserythropoietic anemia type I: First report from the Congenital Dyserythropoietic Anemia Registry of North America (CDAR). Blood Cells Mol Dis. 2021 Mar;87:102534. doi: 10.1016/j.bcmd.2020.102534. Epub 2020 Dec 24.
- Derived from this study: PubMed 41347995Elgammal Y, Zhang W, Kalfa TA. Molecular surprises in evaluations of red cell disorders. Hematology Am Soc Hematol Educ Program. 2025 Dec 5;2025(1):370-376. doi: 10.1182/hematology.2025000726.
- Derived from this study: PubMed 33463537Kim S, Khoriaty R, Li L, McClune M, Kalfa TA, Wu J, Peltier D, Fujiwara H, Sun Y, Oravecz-Wilson K, King RA, Ginsburg D, Reddy P. ER-to-Golgi transport and SEC23-dependent COPII vesicles regulate T cell alloimmunity. J Clin Invest. 2021 Jan 19;131(2):e136574. doi: 10.1172/JCI136574.
- Individual participant dataSharing planned: Yes. Data regarding subjects that meet inclusion will be collected confidentially at initial presentation or diagnosis and periodically thereafter over a long period of time (>15 years). In addition, blood, bone marrow and/or DNA samples of enrolled subjects will be stored for research studies with the aim to improve diagnosis, treatment and care of CDA. The samples and medical information (that is not associated with a patient's name) may be used by other researchers studying CDA, at Cincinnati Children's Hospital Medical Center or at other institutions. The researchers must get Institutional Review Board (a board that is in charge of regulating research done on people) approval prior to requesting data and/or samples from this repository if applicable. No identifying information (that associates the medical information with the subject or sample) will be available to them.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Hotline contact
Theodosia Kalfa, MD, PhD principal investigator
Children's Hospital Medical Center, Cincinnati
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Congenital Dyserythropoietic Anemia (CDA), run by Children's Hospital Medical Center, Cincinnati at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 16 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Hotline (513-636-6770), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Age and symptoms at presentation and/or diagnosis (time frame: From study entry to >15 years). The study lists 11 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02964494, which also lists 8 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 Jun 2026; AzTrials last refreshed its copy on 8 Nov 2026.