New shot could ease pain of plantar fibromatosis
NCT ID NCT05152173
First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tested an injection called EN3835 against a placebo in 176 people with plantar fibromatosis, a condition causing painful lumps on the soles of the feet. The goal was to see if EN3835 reduces foot pain and improves daily function over 57 days. Participants received up to two injections, and researchers measured pain and difficulty scores.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- EN3835 (a biologic injection)
- What this could lead to
- If it works, this could point toward a non-surgical treatment to ease foot pain and improve walking for people with plantar fibromatosis.
- What could go wrong
- This is an early Phase 2 trial with only 176 participants, so results may not apply to everyone. The treatment may not reduce pain better than placebo, and side effects are possible.
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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176 people
The number who actually took part.
- Started
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Nov 2021
- Finished
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Jan 2023
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
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.
Show the full entry requirements Hide 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: 1. Has a diagnosis of plantar fibromatosis AND have at least 1 measurable, hard or firm, palpable fibrous nodule on clinical examination. 2. Has no significant medical history or examination findings related to the participant's plantar nodule(s), which in the investigator's opinion, would make the participant unsuitable for study intervention administration. 3. Agree not to use opioids during the study period and has not used opioids 2 weeks before the Screening Visit. 4. Agree to not initiate or change use of orthotics or inserts designed to relieve symptoms of plantar fibromatosis during the study period. 5. If female, be of non-childbearing potential (history of hysterectomy, bilateral oophorectomy, bilateral tubal ligation, or postmenopausal with no history of menstrual flow in the 12 months prior to the Screening Visit); or, if of childbearing potential, be non-pregnant, non-lactating and agree to use effective contraception when with a male partner for the duration of the study and for 28 days after any active treatment period. 6. Willing and able to comply with all protocol required visits and assessments. 7. Be adequately informed and understand the nature and risks of the study and be able to provide consent. Exclusion Criteria: 1. Has the presence of non-plantar fibromatosis-related nodules on the foot/feet (eg, neurofibroma, rhabdomyosarcoma, liposarcoma, neurilemmomas, rheumatoid nodules, desmoid tumors, or malignant soft tissue lesions of the foot or ankle). 2. Has any musculoskeletal, neuromuscular, neurosensory, other neurological or related disorder that affects the participant's use of his or her feet and/or would impair his/her completion of study assessments as determined by the investigator. 3. Has a known allergy to collagenase or any other excipient of EN3835. 4. Has a known coagulation disorder or is taking any medications that would increase the risk of bleeding (except \<150mg of aspirin daily), 7 days prior to first injection and for the duration of the study. 5. Has concurrent diseases that might interfere with the conduct of the study, confound the interpretation of the study results or endanger the participant's well-being. If there is a history of such disease and the condition has been stable for greater than one year and is judged by the investigator not to interfere, the participant may be included, with the documented approval of the Medical Monitor. 6. Is from a vulnerable population, as defined by the US Code of Federal Regulations (CFR) Title 45, Part 46, Section 46.111(b) and other local and national regulations, including but not limited to, employees (temporary, part-time, full-time, etc) or a family member of the research staff conducting the study, or of the sponsor, or of the contract research organization, or of the IRB/IEC. 7. Has any other condition(s) that, in the investigator's opinion, might indicate the participants to be unsuitable for the study.
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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.
Contacts and locations
Locations
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Endo Clinical Trial Site #1
McAllen, Texas, 78501, United States
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Endo Clinical Trial Site #10
Pinellas Park, Florida, 33782, United States
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Endo Clinical Trial Site #11
Suffolk, Virginia, 23434, United States
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Endo Clinical Trial Site #12
Tarzana, California, 91356, United States
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Endo Clinical Trial Site #13
Whittier, California, 90603, United States
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Endo Clinical Trial Site #14
Sweetwater, Florida, 33172, United States
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Endo Clinical Trial Site #15
Bakersfield, California, 93311, United States
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Endo Clinical Trial Site #16
Atlantis, Florida, 33462, United States
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Endo Clinical Trial Site #17
Dallas, Texas, 75208, United States
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Endo Clinical Trial Site #18
Salt Lake City, Utah, 84107, United States
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Endo Clinical Trial Site #19
O'Fallon, Illinois, 62269, United States
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Endo Clinical Trial Site #2
Dallas, Texas, 75251, United States
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Endo Clinical Trial Site #20
Las Vegas, Nevada, 89119, United States
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Endo Clinical Trial Site #21
San Antonio, Texas, 78211, United States
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Endo Clinical Trial Site #22
Vista, California, 92083, United States
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Endo Clinical Trial Site #23
Pasadena, Maryland, 21122, United States
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Endo Clinical Trial Site #24
Cedar Park, Texas, 78613, United States
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Endo Clinical Trial Site #25
Houston, Texas, 77027, United States
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Endo Clinical Trial Site #26
Lynchburg, Virginia, 24501, United States
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Endo Clinical Trial Site #27
La Mesa, California, 91942, United States
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Endo Clinical Trial Site #28
Jefferson City, Missouri, 65109, United States
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Endo Clinical Trial Site #29
Mesa, Arizona, 85206, United States
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Endo Clinical Trial Site #3
South Miami, Florida, 33143, United States
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Endo Clinical Trial Site #30
Los Angeles, California, 90010, United States
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Endo Clinical Trial Site #31
Meridian, Idaho, 83642, United States
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Endo Clinical Trial Site #32
Decatur, Illinois, 62521, United States
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Endo Clinical Trial Site #33
Springfield, Illinois, 62704, United States
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Endo Clinical Trial Site #34
Oklahoma City, Oklahoma, 73109, United States
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Endo Clinical Trial Site #35
Arlington, Texas, 76015, United States
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Endo Clinical Trial Site #36
Torrance, California, 90502, United States
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Endo Clinical Trial Site #37
Midlothian, Virginia, 23114, United States
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Endo Clinical Trial Site #38
Lawrenceville, Georgia, 30043, United States
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Endo Clinical Trial Site #39
Georgetown, Texas, 78628, United States
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Endo Clinical Trial Site #4
York, Pennsylvania, 17402, United States
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Endo Clinical Trial Site #40
Miami, Florida, 33176, United States
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Endo Clinical Trial Site #41
Encinitas, California, 92024, United States
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Endo Clinical Trial Site #42
Tucson, Arizona, 85712, United States
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Endo Clinical Trial Site #43
Jacksonville, Florida, 32209, United States
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Endo Clinical Trial Site #5
Bedford, Texas, 76021, United States
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Endo Clinical Trial Site #6
San Antonio, Texas, 78229, United States
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Endo Clinical Trial Site #7
Fort Worth, Texas, 76104, United States
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Endo Clinical Trial Site #8
Houston, Texas, 77095, United States
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Endo Clinical Trial Site #9
Fresno, California, 93710, United States
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