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Massive study aims to unlock secrets of rare chromosome 18 disorders

NCT ID NCT00227253

Knowledge-focused Sponsor: The University of Texas Health Science Center at San Antonio Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study is gathering medical and educational information from up to 4,000 people with chromosome 18 abnormalities and their families. The goal is to better understand these rare conditions and provide better resources and care. Participants must be at least one year old and in good health.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 4,000 people

The number the study aims to enrol. It can still change while the study runs.

Start date

Sep 1993

Expected to finish

Dec 2040

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Must have a confirmed diagnosis of Chromosome 18 or be the parent/guardian of a child with Chromosome 18 * Subject must be at least one year of age to participate in the clinical examination aspect of the study (due to issues of venous access and blood volume required to complete studies) * General health status: good

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Must have a confirmed diagnosis of Chromosome 18 or be the parent/guardian of a child with Chromosome 18 * Subject must be at least one year of age to participate in the clinical examination aspect of the study (due to issues of venous access and blood volume required to complete studies) * General health status: good Exclusion Criteria: * Pregnant women * Dead fetuses * Prisoners * Non-viable neonates or neonates of uncertain viability

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Conditions

The condition(s) this trial relates to.

chromosomal disorder chromosome 18 disorder Chromosome Aberrations isolated congenital growth hormone deficiency pituitary dwarfism

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Chromosome aberrations Growth hormone deficiency Hypomyelination

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    2 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • University Health Systems Hospital

    RECRUITING

    San Antonio, Texas, 78229, United States

  • University of Texas Health Science Center at San Antonio

    RECRUITING

    San Antonio, Texas, 78229, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.