A Phase 1/2 interventional study of Trametinib tablet in Vascular Anomalies, sponsored by West China Hospital. Active, not recruiting at 1 site in China. Open to participants aged 1 Year and older. Per ClinicalTrials.gov, last updated 2025-07-22.
Sponsored by West China Hospital · Phase 1/2, Interventional, and Treatment
Complicated vascular anomalies have diverse etiologies and variable clinical manifestations, and no standardized treatment protocol has been established. Since most patients present with diffuse lesions that are difficult to resect surgically, identifying effective therapeutic strategies is of critical importance. This study aims to evaluate the safety and efficacy of systemic trametinib therapy in patients with complicated vascular anomalies.
In recent years, with the widespread application of molecular diagnostic technologies and the growing awareness of complicated vascular anomalies among clinicians, an increasing number of molecular alterations have been identified in these disorders. This progress has brought new hope for patients who previously lacked standardized treatment options. Multiple somatic point mutations have been discovered in complicated vascular anomalies, and case reports have demonstrated significant therapeutic benefits from mutation-based targeted therapies-particularly in patients with NRAS mutations treated with MEK inhibitors. However, to date, there have been no prospective studies evaluating the safety and efficacy of trametinib in pediatric patients with complicated vascular anomalies. Such research is urgently needed to provide robust clinical evidence to guide treatment decisions for this challenging patient population.
79 studies on the registry are indexed under Vascular Malformations; 33 are open to participants now.
This study's planned enrollment of 20 is below the median of 55 across 49 interventional studies indexed under Vascular Malformations.
Browse Vascular Malformations studies →West China Hospital is the lead sponsor of 501 studies on the registry; 246 are open to participants now.
Counted across the registry records on this site, refreshed daily.
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.
-Presenting a complicated vascular anomalies vascular anomalies with the following characteristics:
; Compatible MRI findings; History and clinical features.
Exclusion Criteria:
Patients with inadequate liver function:
Total higher than or equal to 1.5 × the (ULN) for age and and aspartate aminotransferase higher than or equal to 2.5 × the ULN for age.
Patients with inadequate renal function:
0-5 years of age maximum serum creatinine (mg/dL) of 0.8; 6-10 years of age maximum serum creatinine (mg/dL) of 1.0; 11-14 years of age maximum serum creatinine (mg/dL) of 1.2;
Adequate bone marrow function:
lower than 1 × 109/L;
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.
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
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.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
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.
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.
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.
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.
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.
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
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.
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.
Biopsy and archival tissue
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Cancer (malignancy)
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Patients will receive oral trametinib once daily
Drug: Trametinib tablet
Drug is supplied in 0.5 mg and 2 mg tablets
The proportion of patients achieving an objective response at month 12
Objective response was defined as ≥20% reduction in lesion volume compared to that at baseline.
Time frame: 12 months
The proportion of patients achieving an objective response at month 6
Objective response was defined as ≥20% reduction in lesion volume compared to that at baseline.
Time frame: 6 months
lesion responses
The primary endpoint was classified as follow: -Complete involution: 100% resolution of the measured lesion volume; -Nearly complete involution was defined as decrease of ≥75% and \<100%; -Partial involution was defined as decrease of ≥20% and \<75%; -No change was defined as \<20% increase and \<20% decrease in the volumes of LM lesions; -Further growth was defined as ≥20% increase in the volume of index compared with the baseline volume measured. Lesion responses were overall lesion response rate and good lesion response rate. Overall lesion response comprised complete, nearly complete and partial involutions. Good lesion response comprised complete and nearly complete involutions.
Time frame: 6 and 12 months
Quality of life (QOL) in patients
Pediatric Quality of Life Inventory (PedsQLTM) 4.0 Genetic Core Infant Scales (\<2 years) or Pediatric Quality of Life Inventory (PedsQLTM) 4.0 Genetic Core Scales (2-18 years) were used.
Time frame: 12 months
Disease sequelae
Disease sequelae were assessed by site investigators at month 12. The site investigators assessed patients' extremity swelling (if any), general physical activity and exercise levels.
Time frame: 12 months
Frequency of adverse events
Frequency of adverse events (e.g. gastrointestinal disorders, blood and lymphatic system disorders, metabolic disorders or other abnormal laboratory results, skin disorders and general disorders, etc.) collected by investigator and reported by parents. All adverse events were collected and graded according to Common Terminology Criteria for Adverse Events, version 5.0 (CTCAE v5.0). The causality of the adverse event was determined by the multidisciplinary staff and was classified as definitively not related, probably not related, possibly related, probably related, or definitively related. Any dose reductions, interruptions, or cessations enacted at the discretion of the investigators were recorded.
Time frame: 12 months
Plan to share: No
This study is active, not recruiting, as verified in Jul 2025. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: Trametinib