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Could poking holes in cysts stop them coming back?

NCT ID NCT07385560

Symptom relief Sponsor: Istanbul University - Cerrahpasa Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tests whether adding a procedure called fenestration (making small holes in the cyst wall) to standard aspiration and steroid injection can improve outcomes for people with painful Baker's cysts behind the knee. Forty-four adults with knee osteoarthritis and a Baker's cyst will be randomly assigned to receive either standard treatment or standard treatment plus fenestration. Researchers will measure cyst size, pain, and recurrence over three months to see if fenestration helps more.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
steroid-lidocaine injection and fenestration procedure
What this could lead to
If successful, this could offer a more effective, minimally invasive treatment for Baker's cysts that reduces the chance of the cyst coming back.
What could go wrong
This is a small, early-stage trial with only 44 participants, so results may not apply to everyone. The fenestration technique is new and may not provide additional benefit over standard care.

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

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 44 people

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

Expected to start

Feb 2026

An estimate. Start dates often move.

Expected to finish

May 2026

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.

Ages

40 to 75 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Adults aged 40 to 75 years * Diagnosis of knee osteoarthritis according to the 2010 American College of Rheumatology (ACR) criteria * Presence of a symptomatic Baker's cyst confirmed by ultrasonography * Ability to understand study procedures and provide written informed consent * Sufficient intellectual and social capacity to comply with study visits and follow-up requirements Exclusion Criteria: * Presence of inflammatory arthritis, septic arthritis, crystal arthropathy, or secondary causes of knee osteoarthritis * Kellgren-Lawrence grade 4 knee osteoarthritis * Active systemic infection * History of malignancy * Intra-articular knee injection within the past 3 months * Knee trauma within the past 3 months * History of knee surgery * Contraindications to aspiration or corticosteroid injection (e.g., local infection, bleeding disorders, uncontrolled diabetes mellitus) * Requirement to continue medications for inflammatory arthritis * Diagnosed psychiatric disorder that may impair study participation * Use of nonsteroidal anti-inflammatory drugs (NSAIDs) within the past 1 week * Physical therapy applied to the knee region within the past 1 month

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Conditions

The condition(s) this trial relates to.

osteoarthritis, knee popliteal cyst

As listed by the trial registrant

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

Baker cyst Fenestration Knee osteoarthritis Musculoskeletal ultrasound Omeract Steroid injection

How to take part

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

  1. The places running it

    1 site. 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

  • Istanbul University-Cerrahpasa, Cerrahpasa Faculty of Medicine, Department of Physical Medicine and Rehabilitation

    Istanbul, Istanbul, 34098, Turkey (Türkiye)

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