Clinical trial Recruiting at 1 site Observational Ages 18 to 99

Understanding the natural progression of blood cell disorders

Official title: Investigation of the Natural Progression of Clonal Hematopoiesis of Indeterminate Potential and Clonal Cytopenia of Undetermined Significance.

Run by National Institutes of Health Clinical Center (CC) · NCT04102423 · Data updated 2026-11-12

This study is trying to understand how certain blood cell disorders develop over time in adults by looking at their genes and seeing if they are linked to blood cancers and other health issues.

Quick facts

Study typeObservational
Ages18 Years to 99 Years
SexAll
Enrollment306 (estimated)
SponsorNational Institutes of Health Clinical Center (CC)
NIH
Locations1 site (Bethesda, Maryland)
StatusRecruiting
StartedMarch 3, 2020
Main results expectedSeptember 15, 2033
Study endsSeptember 15, 2033
Registry record updatedSeptember 28, 2026
Trial IDNCT04102423 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include adults aged 18 and older with CHIP or CCUS and specific somatic pathogenic variants.

Probably not a fit

Patients with known hematological malignancies or severe cytopenias will not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study aims to investigate the natural history of Clonal Hematopoiesis of Indeterminate Potential (CHIP) and Clonal Cytopenia of Undetermined Significance (CCUS) in adults. Researchers will screen participants for somatic pathogenic variants associated with blood cancers through blood samples and gene testing. The study seeks to verify the links between these genetic mutations, atherosclerosis, and the development of blood cancers, while also exploring new clinical associations. The findings could enhance understanding of these conditions and their progression.

Why it matters

Potential benefit: If successful, this study could lead to better risk assessment and management strategies for patients with CHIP and CCUS.

How similar studies have gone: While the study focuses on the natural history of these conditions, similar approaches have shown promise in understanding pre-neoplastic phases in other hematological disorders.

Who can join: the full rules

Show full inclusion / exclusion criteria
* Participants with Clonal Hematopoiesis of Indeterminate Significance (CHIP):

INCLUSION CRITERIA:

* Greater than or equal to 18 years of age
* Willingness and capacity to provide written informed consent
* Presence of a somatic pathogenic variant associated with hematological malignancy
* Variant allele fraction of greater than or equal to 2% in at least one identified somatic pathogenic variant

EXCLUSION CRITERIA:

* Known diagnosis of a hematological malignancy or bone marrow failure syndrome (excluding MGUS or MBL)
* Presence of a cytopenia:

  --Hemoglobin, \<10 g/dL; platelet count, \<100 X 10\^9 /L; or absolute neutrophil count, \<1.5 X 10\^9 /L
* Pregnant at the time of recruitment

Participants with Clonal Cytopenia of Uncertain Significance (CCUS):

INCLUSION CRITERIA:

* Greater than 18 years of age
* Willingness and capacity to provide written informed consent
* Presence of a somatic pathogenic variant associated with hematological malignancy without morphological evidence of

myelodysplasia and without a MDS defining cytogenetic abnormality

* Variant allele fraction of greater than or equal to 2% in at least one identified somatic pathogenic variant
* Bone marrow aspirate and biopsy excluding hematological malignancy and MDS
* Presence of a cytopenia for \>30 days

  * Hemoglobin, \<10 g/dL; platelet count, \<100 X10\^9 /L; or absolute neutrophil count, \<1.5 X10\^9 /L
  * At least 2 CBCs documented in a non-hospitalized patient at least 3 days apart

EXCLUSION CRITERIA:

* Known diagnosis of a hematological malignancy or bone marrow failure syndrome (excluding MGUS or MBL)
* Morphological evidence of dysplasia on bone marrow aspirate / biopsy 10% dysplastic cells in any hematopoietic lineage
* Ringed sideroblasts \>15%
* Presence of MDS defining cytogenetic abnormality

  * Del(7q)
  * del(5q)
  * 17q or t(17p)
  * Del(13q)
  * del(11q)
  * del(12p) or t(12p)
  * del(9q)
  * idic(X)(q13)
  * t(11;16)
  * t(3;21)
  * t(1;3)
  * t(2;11)
  * inv(3)/t(3;3)
* t(6;9)

  --Note: As a sole cytogenetic abnormality in the absence of morphological criteria, gain of chromosome 8, del(20q) and loss of chromosome Y are not considered definitive evidence of MDS.
* Alternate hematological diagnosis causing cytopenia
* Pregnant at time of recruitment

Where it's running

  • National Institutes of Health Clinical Center
    Bethesda, Maryland, United States
    Recruiting

Study contacts

  • Principal investigator: Fernanda Gutierrez Rodrigues — National Heart, Lung, and Blood Institute (NHLBI)
  • Study coordinator: Chanelle A Hutchinson
  • Email: chanelle.hutchinson@nih.gov
  • Phone: (301) 827-1094

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.