Follow-up Study of ICUS and CCUS Patients

December 21, 2025 updated by: Sheng-Li Xue, MD, The First Affiliated Hospital of Soochow University

A Follow-up Observational Study of ICUS and CCUS Patients

The proposed minimal diagnostic criteria for myelodysplastic syndromes (MDS) and potential pre-MDS conditions has been released by an international consensus group. Based on the criteria, patients with persistent cytopenia could be diagnosed with MDS, CCUS and ICUS. However, the process and outcome of pre-MDS conditions (CCUS, ICUS) is still to be characterized in Chinese population. We design this prospective observational study to explore the disease process and outcome in ICUS and CCUS patients.

Study Overview

Status

Enrolling by invitation

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Estimated)

300

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
    • Jiangsu
      • Suzhou, Jiangsu, China, 215006
        • The First Affliated Hospital of Soochow University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Patients diagnosed with ICUS and CCUS based on the proposed minimal diagnostic criteria for myelodysplastic syndromes (MDS) and potential pre-MDS conditions

Description

Inclusion Criteria:

  • Patients with cytopenia of any degree in one or more lineages: erythrocytes, neutrophils, or platelets. And the cytopenia has to be persistent (≥ 4 months) and lacking minimal diagnostic criteria of MDS.

Exclusion Criteria:

  • Patients with cytopenia which could be explained by any other hematologic or non-hematologic disease.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Idiopathic cytopenia of undetermined significance (ICUS)
Other: Observation and necessary supportive care
For patients with ICUS and CCUS, necessary supportive care could be given. No addtitional treatment is administrated.
Clonal cytopenia of unknown significance (CCUS)
Other: Observation and necessary supportive care
For patients with ICUS and CCUS, necessary supportive care could be given. No addtitional treatment is administrated.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Culumative transformation rate
Time Frame: 5 years
Transformation is defined as progression from ICUS to CCUS, ICUS to MDS or CCUS to MDS. All patients are followed-up since entry into this trial and transformation events are recorded. Cumulative transformation rate is defined for all patients and estimated by competing risk methods.
5 years

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Event-free survival
Time Frame: 5 years
Defined for all patients entry into this trial; measured from the date of entry into this trial to the date of progression or death from any cause; patients not known to have any of these events are censored on the date they were last examined.
5 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

The First Affiliated Hospital of Soochow University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 1, 2011

Primary Completion (Estimated)

December 31, 2026

Study Completion (Estimated)

December 31, 2026

Study Registration Dates

First Submitted

June 9, 2020

First Submitted That Met QC Criteria

June 9, 2020

First Posted (Actual)

June 11, 2020

Study Record Updates

Last Update Posted (Actual)

December 29, 2025

Last Update Submitted That Met QC Criteria

December 21, 2025

Last Verified

December 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • SZcytopenia01

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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