ClinicalTrials.gg
Enrolling by invitationNCT04503213Updated Jan 8, 2026

A Study to Assess CSF1R-related Leukoencephalopathy After Stem Cell Transplantation

An observational study in CSF1R-related Leukoencephalopathy, ALSP and POLD, sponsored by Mayo Clinic. Enrolling by invitation at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-01-08.

Sponsored by Mayo Clinic · Observational

Study type
Observational
Model
Case-only
Time perspective
Prospective
Enrollment
20
Ages
18 Years and older
Sex
All
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Study summary

The purpose of this study is to measure the effect of Hematopoietic Stem Cell Transplantation (HSCT) on symptoms of CSF1R-related Leukoencephalopathy.

Read the detailed description

The purpose of this study is to measure the effect of Hematopoietic Stem Cell Transplantation (HSCT) on symptoms of CSF1R-related Leukoencephalopathy.

02

Conditions studied

  • CSF1R-related Leukoencephalopathy
  • ALSP
  • POLD
  • Hematopoietic Stem Cell Transplantation

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Keywords

  • HDLS, Leukoencephalopathy
03

In context

Leukoencephalopathies

39 studies on the registry are indexed under Leukoencephalopathies; 16 are open to participants now.

This study's planned enrollment of 20 is below the median of 100 across 28 observational studies indexed under Leukoencephalopathies.

Browse Leukoencephalopathies studies →

Lead sponsor

Mayo Clinic is the lead sponsor of 3,269 studies on the registry; 672 are open to participants now.

Of its 452 completed or terminated interventional studies of FDA-regulated products, 321 (71%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Subjects will be identified through the Mayo Clinic Florida Neurology and/or Hematology Departments. Qualifying individuals will be identified on the basis of a genetically-confirmed diagnosis of CSF1R-related leukoencephalopathy and a tentative treatment plan including haematopoietic stem cell transplantation (HSCT).

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • ≥ 18 years of age.
  • Genetic confirmation of a mutation in the CSF1R gene.
  • Diagnosis of CSF1R-related leukoencephalopathy.
  • Anticipated to undergo haematopoietic stem cell transplantation ().

Exclusion criteria

Exclusion Criteria:

  • Concurrent diagnoses that may confound neuropsychological testing; e.g., major hearing/visual impairment.
  • Concurrent diagnoses that may confound ambulatory measurements; e.g., amputee.
  • Inability to undergo magnetic resonance imaging (MRI); e.g., MR-incompatible implant.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Allogeneic and autologous transplant

Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.

05

Study design

Observational model
Case-only
Time perspective
Prospective
Enrollment
20 participants (estimated)
Patient registry
No
06

What researchers measure

Primary outcomes

  1. Improvement in cognitive and motor function

    Number of participants to demonstrate stability/improvements in cognitive and motor function by detailed clinical assessment and radiographic markers of disease.

    Time frame: Through study completion, approximately 5 years

07

Study locations

1 site
08

References and documents

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Jul 2020 (actual). Primary completion is estimated for Dec 2027, 89 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 4, 2020
First posted
Aug 7, 2020
StartActual
Jul 21, 2020
Primary completionEst.
Dec 2027
CompletionEst.
Dec 2027
Last update
Jan 8, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jan 8, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04503213
Lead sponsor
Mayo Clinic
Responsible party
Zbigniew K. Wszolek (Principal Investigator, Mayo Clinic) — Principal investigator
First posted
Aug 7, 2020
Start date
Jul 21, 2020
Primary completion
Dec 2027 (estimated)
Completion
Dec 2027 (estimated)
Last update
Jan 8, 2026

Study contacts

Zbigniew K Wszolek, MD
principal investigator · Mayo Clinic

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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No contact was published for this record. The registry link below has the sponsor’s details.

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