ClinicalTrials.gg
Active, not recruitingNCT04488822PLX3397Updated Jun 26, 2026Results posted

A Study of the Efficacy and Safety of Pexidartinib in Adult Subjects With TGCT

A Phase 3 interventional study of Pexidartinib in Tenosynovial Giant Cell Tumor, sponsored by Daiichi Sankyo Co., Ltd.. Active, not recruiting at 9 sites in 2 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-06-26.

Sponsored by Daiichi Sankyo Co., Ltd. · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
40
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

This study will assess pexidartinib in adult participants with symptomatic TGCT that is associated with severe morbidity or functional limitations and not amendable to improvement with surgery.

Read the detailed description

Participants with symptomatic TGCT will be administered pexidartinib 400 mg twice daily continuously with 28-day treatment cycle until criteria for discontinuation are reached. Participants who complete primary endpoint assessments may be eligible to continue receiving pexidartinib until disease progression, unacceptable toxicity, the occurrence of other termination criteria, or withdrawal from the study. Eligible participants' status will be collected every 6 months as a long term follow-up at least 2 years.

02

Conditions studied

  • Tenosynovial Giant Cell Tumor

Keywords

  • Tenosynovial Giant Cell Tumor
  • Pexidartinib
  • TURALIO™
  • PLX3397
03

In context

Giant Cell Tumor of Tendon Sheath

22 studies on the registry are indexed under Giant Cell Tumor of Tendon Sheath; 5 are open to participants now.

This study's enrollment of 40 is above the median of 34 across 20 interventional studies indexed under Giant Cell Tumor of Tendon Sheath.

Browse Giant Cell Tumor of Tendon Sheath studies →

Lead sponsor

Daiichi Sankyo Co., Ltd. is the lead sponsor of 73 studies on the registry; none are open to participants now.

Of its 10 completed or terminated interventional studies of FDA-regulated products, 8 (80%) have results posted.

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

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

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

  • Age ≥ 18 years (Age ≥ 20 years in Taiwan).
  • A diagnosis of TGCT (i) that has been confirmed by a pathologist and (ii) associated with severe morbidity or functional limitations and not amenable to improvement with surgery determined consensually by qualified personnel (eg, 2 surgeons or a multi-disciplinary tumor board).
  • as defined by 1.1 (except that a minimal size of 2 cm is required), assessed from MRI scan by a central radiologist.
  • Stable prescription of analgesic regimen during the 2 weeks prior to enrollment.
  • Women of must have a negative serum pregnancy test within the 14-day period prior to enrollment (Where demanded by local regulations, this test may be required within 72 hours of enrollment).
  • Females of should be advised to use an effective, non-hormonal method of during treatment with pexidartinib and for 1 month after the last dose. Males with female partners of reproductive potential should be advised to use an effective method of contraception during treatment with pexidartinib and for 1 month after the last dose. Female partners of male participants should concurrently use effective contraceptive methods (hormonal or non-hormonal). Women of nonchildbearing potential may be included if they are either surgically sterile or have been for ≥ 1 year. Women who have documentation of at least 12 months of spontaneous amenorrhea and have a follicle stimulating hormone level > 40 mIU/mL will be considered postmenopausal.
  • Adequate hematologic, hepatic, and renal function, defined by:

    • ≥ 1.5 × 10\^9/L
    • > 10 g/dL
    • count ≥ 100 × 10\^9/L
    • (AST) and alanine aminotransferase (ALT) ≤ 1.0 × (ULN)
    • Total and direct bilirubin ≤ 1.0 × ULN
    • Alkaline phosphatase ≤ 1.0 × ULN
    • (CLcr) > 15 mL/min
  • Willingness and ability to complete the PROMIS Physical Function Scale.
  • Willingness and ability to use a diary.
  • Willingness and ability to provide written prior to any study-related procedures and to comply with all study requirements.

Exclusion criteria

Exclusion Criteria:

  • drug/device use within 28 days of enrolment.
  • Previous use of pexidartinib or any biologic treatment targeting colony stimulating factor 1 (CSF-1) or the CSF-1 receptor; previous use of oral tyrosine kinase inhibitors are allowed (eg, imatinib or nilotinib).
  • Active cancer except for tumor for which a participant is enrolled in the study, (either concurrent or within the last year of starting study drug) that requires therapy (eg, surgical, chemotherapy, or radiation therapy), with the exception of adequately treated basal or squamous cell carcinoma of the skin, melanoma in situ, carcinoma in situ of the cervix or breast, or prostate carcinoma with a prostate-specific antigen value \< 0.2 ng/mL.
  • Known TGCT.
  • Active or chronic infection with or known positive surface antigen, or known active or chronic infection with .
  • Active liver or biliary tract disease
  • Known active tuberculosis.
  • Significant concomitant arthropathy in the affected joint, serious illness, uncontrolled infection, or a medical or psychiatric history that, in the Investigator's opinion, would likely interfere with a participant's study participation or the interpretation of his or her results.
  • Use of strong Cytochrome P450 (CYP) 3A inducers, including St John's wort, proton pump inhibitors (PPIs), and other products known to cause hepatotoxicity.
  • Women who are breastfeeding.
  • A screening Fridericia interval (QTcF) ≥ 450 ms (men) or ≥ 470 ms (women).
  • MRI .
  • History of to any in the investigational product.
  • Inability to swallow capsules.
Terms in these criteria, in plain language(24)

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.

Histologically or cytologically confirmed

The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).

Your pathology report is the document that shows this.

Measurable disease

The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.

The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.

RECIST

The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.

“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Reproductive potential

Able to have children. For women this usually means from the first period until menopause, unless permanently unable to through surgery; for men, unless permanently sterile. Read who the line is about — participants, women, men, or their partners.

Criteria about it usually ask for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Absolute neutrophil count (ANC)

The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.

It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

Creatinine clearance (CrCl)

How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

QT and QTc

On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.

The study may name a correction formula and a limit in milliseconds, often around 450–480.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Excipients

The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
40 participants (actual)

Study arms

  • Experimental
    Pexidartinib

    Drug: Pexidartinib

Interventions

  • 400 mg twice daily for a total daily dose of 800 mg (each capsule contains 200 mg of pexidartinib for oral administration)

    Also known as: TURALIO™, PLX3397

06

What researchers measure

Primary outcomes

  1. Overall Response Rate (ORR) of Pexidartinib Based on RECIST 1.1 of Asian Participants With Symptomatic Tenosynovial Giant Cell Tumor (TGCT) at Week 25

    For the assessment of tumor response, participants were classified into the best of the following tumor response categories based on Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) by centrally reviewed MRI scan. Complete response (CR), disappearance of all target lesions and normalization of tumor marker level; partial response (PR), at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters; and overall response rate (ORR), defined as CR+PR, are presented.

    Time frame: At Week 25 postdose

Secondary outcomes

  1. Overall Response Rate (ORR) of Pexidartinib Based on TVS of Asian Participants With Symptomatic Tenosynovial Giant Cell Tumor (TGCT) at Week 25

    For the assessment of tumor response, participants were classified into the best of the following tumor response categories based on Tumor Volume Score (TVS) by centrally reviewed MRI scan. Tumor Volume Score (TVS) is a semi-quantitative MRI scoring system that describes tumor mass and is based on 10% increments of the estimated volume of the maximally distended synovial cavity or tendon sheath involved. A tumor that is equal in volume to that of a maximally distended synovial cavity or tendon sheath was scored 10; a score of 0 indicated no evidence of tumor. Complete response (CR), disappearance of lesion; partial response (PR), at least 50% decrease in volume score relative to baseline; overall response rate (ORR), defined as CR+PR, are presented.

    Time frame: At Week 25 postdose

  2. Mean Percent Change From Baseline for Range of Motion (ROM) Score in Participants Receiving Pexidartinib

    Range of motion (ROM) of the joint was assessed by a qualified, independent, and blinded or third-party assessors at the clinical site. The relative ROM was calculated (expressed in percent) as follows: Relative ROM = 100 x (absolute ROM measured)/(reference ROM standard). The change from baseline in relative ROM at Week 25 was calculated as the difference in relative ROM at Week 25 visit minus relative ROM at Screening visit.

    Time frame: At Week 25 postdose

  3. Mean Change From Baseline in the Patient-reported Outcomes Measurement Information System (PROMIS) Physical Function Score in Participants Receiving Pexidartinib

    The Patient-reported Outcomes Measurement Information System (PROMIS) physical function scale was used to assess the physical function of the upper and lower limbs. The scale ranges from 1 defined as 'unable to do' or 'cannot do' to 5 defined as 'without any difficulty' or 'not at all', where higher scores represent better outcomes.

    Time frame: At Week 25 postdose

  4. Best Overall Response of Pexidartinib Based on RECIST 1.1 and TVS by Centrally Reviewed MRI Scan

    Best overall response (CR or PR) of pexidartinib based on RECIST 1.1 and TVS are summarized. Tumor categories for RECIST v1.1 were as follows: complete response (CR), disappearance of all target lesions; partial response (PR), at least a 30% decrease in the sum of diameters of target lesions; stable disease (SD), neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease; progressive disease (PD), at least a 20% increase in the sum of diameters of target lesions; and not evaluable (NE). Tumor categories for TVS were as follows: complete response (CR), disappearance of all target lesions; partial response (PR), at least a 50% decrease in volume score relative to baseline; stable disease (SD), does not meet any of the prior criteria based on score during study; progressive disease (PD), at least a 30% increase in in volume relative to lowest score during the study whether at baseline or some other visit; and not evaluable (NE).

    Time frame: From baseline until disease progression or death (whichever occurs first), up to approximately 29 months

  5. Duration of Response of Pexidartinib Based on RECIST 1.1 and TVS by Centrally Reviewed MRI Scan

    Duration of response (DOR) is defined as the date of the first recorded response to the first date of documented disease progression.

    Time frame: Time from the date of first documented response until documented disease progression or death from any cause (whichever occurs first), up to approximately 29 months

  6. Number of Participants Reporting Frequent (≥10%) Treatment-Emergent Adverse Events by Preferred Term

    A Treatment-emergent adverse event (TEAE) is defined as an AE that occurs, having been absent before the first dose of study drug, or has worsened in severity or seriousness after the initiating the study drug until post-treatment visit (28 ± 7 days after the last dose of study drug).

    Time frame: Up to approximately 29 months

  7. Area Under the Plasma Concentration Time Curve From Time 0 to 6 Hours AUC(0-6h) in Participants Receiving Pexidartinib

    AUC(0-6h) was calculated using standard non-compartmental analysis. AUC(0-6h) for Pexidartinib and primary metabolite, ZAAD-1006a, are presented.

    Time frame: Week 3: Cycle 1 Day 1 at pre-dose, 0.5h, 1h, 2h, 4h, and 6h post-dose (each cycle is 28 days)

  8. Maximum Plasma Concentration (Cmax) in Participants Receiving Pexidartinib

    Cmax was calculated using standard non-compartmental analysis. Cmax for Pexidartinib and primary metabolite, ZAAD-1006a, are presented.

    Time frame: Week 3: Cycle 1 Day 1 at pre-dose, 0.5h, 1h, 2h, 4h, and 6h post-dose (each cycle is 28 days)

  9. Time to Reach Maximum Observed Plasma Concentration (Tmax) of Participants Receiving Pexidartinib

    Tmax was calculated using standard non-compartmental analysis. Tmax for Pexidartinib and primary metabolite, ZAAD-1006a, are presented.

    Time frame: Week 3: Cycle 1 Day 1 at pre-dose, 0.5h, 1h, 2h, 4h, and 6h post-dose (each cycle is 28 days)

07

Results

Posted Apr 27, 2023

Participant flow

A total of 40 participants who met all inclusion criteria and no exclusion criteria were enrolled and treated at clinic centers in China and Taiwan. Primary results reported are from baseline up to data cut-off date of 27 Oct 2021. The results presented are based on primary analysis. Data collection is still on-going and additional results will be provided after study completion.

Participant flow — Overall Study
MilestonePexidartinib
Started40
Completed31
Not completed9
Withdrew: Adverse event8
Withdrew: Withdrawal by subject1

Outcome measures

PrimaryOverall Response Rate (ORR) of Pexidartinib Based on RECIST 1.1 of Asian Participants With Symptomatic Tenosynovial Giant Cell Tumor (TGCT) at Week 25

For the assessment of tumor response, participants were classified into the best of the following tumor response categories based on Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) by centrally reviewed MRI scan. Complete response (CR), disappearance of all target lesions and normalization of tumor marker level; partial response (PR), at least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters; and overall response rate (ORR), defined as CR+PR, are presented.

Time frame:
At Week 25 postdose
Reported as:
Count of participants · Participants
Overall Response Rate (ORR) of Pexidartinib Based on RECIST 1.1 of Asian Participants With Symptomatic Tenosynovial Giant Cell Tumor (TGCT) at Week 25
ParticipantsPexidartinib
CR0
PR9
ORR9
SecondaryOverall Response Rate (ORR) of Pexidartinib Based on TVS of Asian Participants With Symptomatic Tenosynovial Giant Cell Tumor (TGCT) at Week 25

For the assessment of tumor response, participants were classified into the best of the following tumor response categories based on Tumor Volume Score (TVS) by centrally reviewed MRI scan. Tumor Volume Score (TVS) is a semi-quantitative MRI scoring system that describes tumor mass and is based on 10% increments of the estimated volume of the maximally distended synovial cavity or tendon sheath involved. A tumor that is equal in volume to that of a maximally distended synovial cavity or tendon sheath was scored 10; a score of 0 indicated no evidence of tumor. Complete response (CR), disappearance of lesion; partial response (PR), at least 50% decrease in volume score relative to baseline; overall response rate (ORR), defined as CR+PR, are presented.

Time frame:
At Week 25 postdose
Reported as:
Count of participants · Participants
Overall Response Rate (ORR) of Pexidartinib Based on TVS of Asian Participants With Symptomatic Tenosynovial Giant Cell Tumor (TGCT) at Week 25
ParticipantsPexidartinib
CR0
PR19
ORR19
SecondaryMean Percent Change From Baseline for Range of Motion (ROM) Score in Participants Receiving Pexidartinib

Range of motion (ROM) of the joint was assessed by a qualified, independent, and blinded or third-party assessors at the clinical site. The relative ROM was calculated (expressed in percent) as follows: Relative ROM = 100 x (absolute ROM measured)/(reference ROM standard). The change from baseline in relative ROM at Week 25 was calculated as the difference in relative ROM at Week 25 visit minus relative ROM at Screening visit.

Time frame:
At Week 25 postdose
Reported as:
Least squares mean · Percent Change
Mean Percent Change From Baseline for Range of Motion (ROM) Score in Participants Receiving Pexidartinib
Percent ChangePexidartinib
Mean Percent Change From Baseline for Range of Motion (ROM) Score in Participants Receiving Pexidartinib23.05 ± 3.207
SecondaryMean Change From Baseline in the Patient-reported Outcomes Measurement Information System (PROMIS) Physical Function Score in Participants Receiving Pexidartinib

The Patient-reported Outcomes Measurement Information System (PROMIS) physical function scale was used to assess the physical function of the upper and lower limbs. The scale ranges from 1 defined as 'unable to do' or 'cannot do' to 5 defined as 'without any difficulty' or 'not at all', where higher scores represent better outcomes.

Time frame:
At Week 25 postdose
Reported as:
Least squares mean · Score on a scale
Mean Change From Baseline in the Patient-reported Outcomes Measurement Information System (PROMIS) Physical Function Score in Participants Receiving Pexidartinib
Score on a scalePexidartinib
Mean Change From Baseline in the Patient-reported Outcomes Measurement Information System (PROMIS) Physical Function Score in Participants Receiving Pexidartinib0.46 ± 1.384
SecondaryBest Overall Response of Pexidartinib Based on RECIST 1.1 and TVS by Centrally Reviewed MRI Scan

Best overall response (CR or PR) of pexidartinib based on RECIST 1.1 and TVS are summarized. Tumor categories for RECIST v1.1 were as follows: complete response (CR), disappearance of all target lesions; partial response (PR), at least a 30% decrease in the sum of diameters of target lesions; stable disease (SD), neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease; progressive disease (PD), at least a 20% increase in the sum of diameters of target lesions; and not evaluable (NE). Tumor categories for TVS were as follows: complete response (CR), disappearance of all target lesions; partial response (PR), at least a 50% decrease in volume score relative to baseline; stable disease (SD), does not meet any of the prior criteria based on score during study; progressive disease (PD), at least a 30% increase in in volume relative to lowest score during the study whether at baseline or some other visit; and not evaluable (NE).

Time frame:
From baseline until disease progression or death (whichever occurs first), up to approximately 29 months

Results for this outcome have not been posted.

SecondaryDuration of Response of Pexidartinib Based on RECIST 1.1 and TVS by Centrally Reviewed MRI Scan

Duration of response (DOR) is defined as the date of the first recorded response to the first date of documented disease progression.

Time frame:
Time from the date of first documented response until documented disease progression or death from any cause (whichever occurs first), up to approximately 29 months

Results for this outcome have not been posted.

SecondaryNumber of Participants Reporting Frequent (≥10%) Treatment-Emergent Adverse Events by Preferred Term

A Treatment-emergent adverse event (TEAE) is defined as an AE that occurs, having been absent before the first dose of study drug, or has worsened in severity or seriousness after the initiating the study drug until post-treatment visit (28 ± 7 days after the last dose of study drug).

Time frame:
Up to approximately 29 months

Results for this outcome have not been posted.

SecondaryArea Under the Plasma Concentration Time Curve From Time 0 to 6 Hours AUC(0-6h) in Participants Receiving Pexidartinib

AUC(0-6h) was calculated using standard non-compartmental analysis. AUC(0-6h) for Pexidartinib and primary metabolite, ZAAD-1006a, are presented.

Time frame:
Week 3: Cycle 1 Day 1 at pre-dose, 0.5h, 1h, 2h, 4h, and 6h post-dose (each cycle is 28 days)
Reported as:
Mean · ng*h/mL
Area Under the Plasma Concentration Time Curve From Time 0 to 6 Hours AUC(0-6h) in Participants Receiving Pexidartinib
ng*h/mLPexidartinib
Pexidartinib51500 ± 28.5
ZAAD-1006a108000 ± 52.1
SecondaryMaximum Plasma Concentration (Cmax) in Participants Receiving Pexidartinib

Cmax was calculated using standard non-compartmental analysis. Cmax for Pexidartinib and primary metabolite, ZAAD-1006a, are presented.

Time frame:
Week 3: Cycle 1 Day 1 at pre-dose, 0.5h, 1h, 2h, 4h, and 6h post-dose (each cycle is 28 days)
Reported as:
Mean · ng/mL
Maximum Plasma Concentration (Cmax) in Participants Receiving Pexidartinib
ng/mLPexidartinib
Pexidartinib12400 ± 32.2
ZAAD-1006a20400 ± 46.3
SecondaryTime to Reach Maximum Observed Plasma Concentration (Tmax) of Participants Receiving Pexidartinib

Tmax was calculated using standard non-compartmental analysis. Tmax for Pexidartinib and primary metabolite, ZAAD-1006a, are presented.

Time frame:
Week 3: Cycle 1 Day 1 at pre-dose, 0.5h, 1h, 2h, 4h, and 6h post-dose (each cycle is 28 days)
Reported as:
Median · hours
Time to Reach Maximum Observed Plasma Concentration (Tmax) of Participants Receiving Pexidartinib
hoursPexidartinib
Pexidartinib2.08 (0.87 to 2.15)
ZAAD-1006a2.12 (1.80 to 5.90)

Adverse events

Collected over Adverse events (AE) were collected from the date of signing the informed consent form up post-treatment visit (28 ± 7 days after the last dose of study drug), up 13 months.. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Pexidartinib0/40 (0%)6/40 (15%)40/40 (100%)
Most frequent serious events
Most frequent serious events
EventPexidartinib
Hepatic function abnormalHepatobiliary disorders3/40
Fistula inflammationMusculoskeletal and connective tissue disorders1/40
OsteonecrosisMusculoskeletal and connective tissue disorders1/40
Epithelioid sarcomaNeoplasms benign, malignant and unspecified (incl cysts and polyps)1/40
PneumothoraxRespiratory, thoracic and mediastinal disorders1/40
Most frequent other events
Showing 10 of 62
Most frequent other events
EventPexidartinib
Hair color changesSkin and subcutaneous tissue disorders31/40
Alanine aminotransferase increasedInvestigations24/40
Aspartate aminotransferase increasedInvestigations23/40
PruritusSkin and subcutaneous tissue disorders19/40
Blood lactate dehydrogenase increasedInvestigations19/40
RashSkin and subcutaneous tissue disorders17/40
Face oedemaGeneral disorders17/40
Gamma-glutamyltransferase increasedInvestigations15/40
White blood cell count decreasedInvestigations14/40
Blood alkaline phosphatase increasedInvestigations12/40

Baseline characteristics

Baseline characteristics were assessed in the Safety Analysis Set.

Age, Categorical
Age, Categorical(Participants)Pexidartinib
<=18 years0
Between 18 and 65 years39
>=65 years1
Age, Continuous
Age, Continuous(Years)Pexidartinib
Mean40.9 ± 12.05
Sex: Female, Male
Sex: Female, Male(Participants)Pexidartinib
Female27
Male13
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Pexidartinib
American Indian or Alaska Native0
Asian40
Native Hawaiian or Other Pacific Islander0
Black or African American0
White0
More than one race0
Unknown or Not Reported0
Region of Enrollment
Region of Enrollment(participants)Pexidartinib
China31
Taiwan9
08

Study locations

9 sites
09

References and documents

Publications

  • Xu H, Wu PK, Ye Z, Fan Z, Li T, Chen TW, Shen J, Yan W, Achiwa I, Yoh K, Kikumori K, Hiruma Y, Greenberg J, Niu X. A Phase 3 Study of the Efficacy and Safety of Pexidartinib in East Asian Patients with Tenosynovial Giant Cell Tumor. Oncol Ther. 2025 Dec;13(4):1025-1039. doi: 10.1007/s40487-025-00365-z. Epub 2025 Aug 21. PubMed 40841499 ↗

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: Yes — De-identified individual participant data (IPD) on completed studies and applicable supporting clinical trial documents may be available upon request at https://vivli.org/. In cases where clinical trial data and supporting documents are provided pursuant to our company policies and procedures, Daiichi Sankyo will continue to protect the privacy of our clinical trial participants. Details on data sharing criteria and the procedure for requesting access can be found at this web address: https://vivli.org/ourmember/daiichi-sankyo/

Supporting information: Study protocol, Statistical analysis plan, Informed consent form

Time frame: Completed studies that has reached a global end or completion with all data set collected and analyzed, and for which the medicine and indication have received European Union (EU) and United States (US), and/or Japan (JP) marketing approval on or after 01 January 2014 or by the US or EU or JP Health Authorities when regulatory submissions in all regions are not planned and after the primary study results have been accepted for publication.

Access criteria: Formal request from qualified scientific and medical researchers on IPD and clinical study documents from clinical trials supporting products submitted and licensed in the United States, the European Union and/or Japan from 01 January 2014 and beyond for the purpose of conducting legitimate research. This must be consistent with the principle of safeguarding study participants' privacy and consistent with provision of informed consent.

Data sharing details ↗ · vivli.org

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Sep 2020 to primary completion in Oct 2021, 13 months.

Results were first posted in Apr 2023, 1 year 6 months after primary completion.

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

Registered
Jul 24, 2020
First posted
Jul 28, 2020
StartActual
Sep 25, 2020
Primary completionActual
Oct 27, 2021
CompletionEst.
Mar 31, 2027
Results first posted
Apr 27, 2023
Last update
Jun 26, 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 Jun 26, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT04488822
Responsible party
Sponsor
First posted
Jul 28, 2020
Start date
Sep 25, 2020
Primary completion
Oct 27, 2021
Completion
Mar 31, 2027 (estimated)
Results posted
Apr 27, 2023
Last update
Jun 26, 2026

Study contacts

Global Clinical Leader
study director · Daiichi Sankyo

Oversight

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

Not currently enrolling

This study is active, not recruiting, as verified in Jun 2026. You cannot join it, but the record below documents what was studied.

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Discussion

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Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Studies of the drug tested here: Pexidartinib

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