Could a simple injection melt away painful calcium deposits?
NCT ID NCT06672822
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tests whether injecting sodium thiosulfate directly into painful calcium deposits (calcinosis) can shrink them and ease symptoms. Twenty adults with scleroderma, dermatomyositis, or mixed connective tissue disease will receive ultrasound-guided injections. The main goal is to see if the lumps get smaller after 12 weeks.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- sodium thiosulfate
- What this could lead to
- If it works, this could offer a new way to reduce painful calcium lumps under the skin without major surgery.
- What could go wrong
- This is a very small early-stage trial with only 20 people, so results may not apply to everyone. The injections are directly into the lesion and could cause pain or infection.
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.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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About 20 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Mar 2025
- Expected to finish
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May 2029
An estimate. End dates often move.
- Lead sponsor
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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.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Clinical diagnosis of systemic sclerosis, mixed connective tissue disease or inflammatory myopathy * Must be over 18 years of age * Participants must be competent to give informed consent * Participants must have radiographic evidence (xray or ultrasound) of calcinosis. * Participants must need symptomatic relief Exclusion Criteria: • Pregnant women will be excluded
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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UPMC Arthritis and Autoimmunity Center
RECRUITINGPittsburgh, Pennsylvania, 15213, United States
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