ClinicalTrials.gg
RecruitingNCT03340129ABC-XUpdated Oct 8, 2026

Anti-PD 1 Brain Collaboration + Radiotherapy Extension (ABC-X Study)

A Phase 2 interventional study of Ipilimumab and Nivolumab in Melanoma Stage Iv, sponsored by Melanoma Institute Australia. Recruiting at 9 sites in 2 countries. Open to participants aged 18 Years to 120 Years. Per ClinicalTrials.gov, last updated 2026-10-08.

Sponsored by Melanoma Institute Australia · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Started Aug 2019; still recruiting 7 years 3 months later.
Updated Oct 8, 2026Primary completion movedGo to Updates ↓

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Phase
Phase 2
Study type
Interventional
Enrollment
218
Allocation
Randomized
Ages
18 Years to 120 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 13 studies in Melanoma by Melanoma Institute Australia — 5 open to participants now, 9 under way, none of them phase 3. Melanoma · Melanoma Institute Australia.

Planned enrollment
3rd of 12
218 · median 68
Started
2019
the only one that year
Phase 2
11 of 13
3 open now
Registered
5th of 13
by date

Among the 13 studies in Melanoma by Melanoma Institute Australia, this one is the 3rd largest by planned enrollment of the 12 interventional ones that give a count, is the only one that started in 2019, is one of 11 in phase 2, and was the 5th registered.

Melanoma

3,372 studies on the registry are indexed under Melanoma; 580 are open to participants now.

Browse Melanoma studies →

Open to participants now

5 of the 13 studies in Melanoma by Melanoma Institute Australia are open now, in 7 countries. Recruiting first, the newest first:

By country, each count listing its studies:

All 5 open studies →

Who these studies take

Of the 468 Melanoma studies recruiting now, 381 (81%) set no upper age limit and 49 (10%) stop at 75 or younger; 47 take children under 18; 29 take healthy volunteers.

This study: 18 Years to 120 Years · all sexes · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 13 studies in Melanoma by Melanoma Institute Australia, or all of them as a file.
02

Study summary

This is a phase II, open label, randomised trial of ipilimumab and nivolumab with concurrent intracranial stereotactic radiotherapy versus ipilimumab and nivolumab alone in patients with asymptomatic, untreated melanoma brain metastases.

Read the detailed description
  1. BACKGROUND The ABC study (NCT02374242) is a phase II clinical trial recruiting 3 cohorts of patients with melanoma brain metastases. 76 patients received immunotherapy with either nivolumab alone or nivolumab combined with ipilimumab. Nivolumab together with ipilimumab was shown to be more effective than nivolumab alone in melanoma brain metastases. The combination will therefore be used in this trial.

    Findings from pre-clinical and clinical research provides evidence supporting the ability of radiotherapy to induce anti-tumour immune responses and augment the efficacy of anti-PD1 checkpoint blockade in melanoma and provide mechanistic rationale for combined therapy.

  2. STUDY DESIGN This current protocol builds on the ABC study and will assess clinical, functional, toxicities and quality of life outcomes with the combined modalities of immunotherapy with radiotherapy to the brain in melanoma patients.

    The main aim of this study will be to assess the effect of immunotherapy +/- concurrent stereotactic radiotherapy (SRS) on the intracranial death rate at 12 months from the commencement of treatment. Secondary aims include the RECIST response in the brain, extracranially and overall, progression free survival, overall survival, neurocognitive function, adverse event rates and quality of life.

    The study will recruit 218 patients with asymptomatic, untreated melanoma brain metastases. All patients will be treated with combination ipilimumab and nivolumab at the doses and duration approved by worldwide regulatory authorities for advanced melanoma. All patients will undergo the the SRS treatment planning MRI of the brain PRIOR to randomisation to ensure that the timing of the baseline intracranial measurements are made within a similar timeframe and so that the delineation of tumour volume is accurately recorded in the same way for both cohorts. Patents will be randomised to receive concurrent intracranial SRS (within 7 days of the baseline / planning MRI scan) or immunotherapy alone. At intracranial disease progression, any form of salvage local therapy (radiotherapy or surgery) may be administered to either cohort.

    Randomisation is 1:1, using a permuted, random block design with stratification by participating centre, LDH (normal / elevated), BRAF (mutant / wild type), 1-2 brain metastases versus > 2 brain metastases.

  3. PRIMARY OUTCOME The neurological specific death rate at 12 months - defined as a proximate cause of death which is a sign, symptom, or diagnosis related to metastatic brain disease.
  4. OBJECTIVE RESPONSES A modified version of RECIST will be used to assess response to treatment. The modification allows for up to 5 brain metastastes to be selected as target lesions and a further 5 extracranial lesions. The immune related response criteria (irRC) will also be applied and concordance evaluated with RECIST. The irRC measures the volume of tumour lesions by calculating bi-dimensional measurements of target lesions.
  5. NEUROCOGNITIVE ASSESSMENT, FUNCTION AND QUALITY OF LIFE Neurocognitive impairment is a concern in the setting of radiotherapy delivered for brain metastases. The addition of immunotherapy for enhanced local disease control and survival may augment the risks. Quality of life (QoL) assessment is therefore an important objective in clinical trials studying the effects of new interventions, where side effects and tolerability are as important as clinical benefit.

    Neurocognitive function will be assessed at baseline and every 6 to 12 weeks using the Montreal Cognitive Assessment (MoCA) and a neurological assessment of the patient. A member of the study team will be nominated to conduct the MoCA to allow for consistency of delivery of the examination. The MoCA measures six cognitive domains: visuospatial/executive function; naming; memory; language; abstraction; and attention. To decrease the learning effect from multiple administrations of the MoCA over a short period of time, alternate versions have been made available.

    The Functional Assessment of Cancer Therapy (FACT) questionnaires are commonly used to assess cancer-related QoL issues. The FACT-Brain (FACT-Br) module provides an additional set of disease-specific questions pertaining to brain neoplasms and is completed by the patient.

    Neurological assessments wil be made using the structured NANO scale at each physical examination - each neurological domain is subdivided into 3 or 4 levels of function with scores based on discrete quantifiable measures. Thus, levels of function for each domain range from 0 to 2 or 0 to 3. A score of 0 indicates normal function, while the highest score indicates the most severe level of deficit for that domain. Levels of function are distinguished by significant and measurable differences in order to avoid misinterpretation of subtle or nonspecific changes.

    The EORTC QLQ-C30, an internationally validated cancer-specific QOL-instrument, assesses various facets of functioning, symptoms common in cancer patients and global QOL. The Brain Cancer Module (EORTC QLQ-BN20 is a 20-item supplement for the QLQ-C30 to assess neurological related quality of life and neurological symptoms and is being utilised in the main ABC study. Among the symptoms captured by neurocognitive tests are communication deficits and memory problems. In these cases, a patient-rated QoL tool may not capture the true effects of the disease or the intervention to treat it. Both C30 and BN20 modules have been validated for assessing health-related quality of life and symptoms in patients with brain cancer.

    General health status will also be measured using the EQ-5D. The EQ-5D is a standardized instrument for use as a measure of self-reported health status. The EQ-5D comprises 5 dimensions (mobility, self-care, usual activities, pain/discomfort and anxiety) and a visual analogue rating scale (VAS). The utility data generated from the EQ-5D is commonly used in cost effectiveness analyses.

  6. TOXICITY AND TOLERABILITY Adverse events will be reported using the CTCAE version 5.0 in addition to causality, duration, treatment required and the need for treatment delays or discontinuation. Radionecrosis is an event of clinical interest and will be captured separately.
  7. CORRELATIVE BLOOD AND TISSUE BIOMARKER STUDIES Some patients may not benefit from radiation therapy and immunotherapy combinations. Therefore, biomarkers predictive of response. or the lack of it are needed. Extensive correlative analyses of tumoural and peripheral blood immunologic changes will be essential to a better understanding of the mechanistic interactions between these 2 treatment modalities. The differential composition of the gut microbiome has been shown to affect antitumor immunity and immunotherapy efficacy and will also be correlated with response and toxicity.

    To address this, blood, tissue, stool and urine samples will be obtained. Blood will be collected at baseline, at 1 week of treatment and then 6 to 12 weekly to examine serum chemokines, cytokines, inflammatory markers, lymphocyte and T cell subsets and myeloid derived suppressor cells and to assess correlation with disease response or progression. All Cohorts will be included in this study.

    In patients with sufficient archival melanoma tissue from metastatic sites, a baseline tumour PD-L1 level, immune markers and genetics of response and resistance will also be measured. If available, tumour tissue following progression of accessible extracranial disease and / or craniotomy will also be tested for immune and genetic markers.

    Stool samples will be obtained at baseline, at weeks 6 and 12 and at the end of immunotherapy to investigate the gut microbiome composition, diversity and abundance and correlation with the response to immunotherapy and immune-related gastrointestinal toxicity. A baseline evaluation of participants' dietary habits will also be included in these analyses.

    A reduction in intestinal barrier function is currently believed to play an important role in pathogenesis of many diseases, response to immunotherapy and immune related toxicity. Urinary excretion of two orally-administered non-metabolizable sugars, lactulose and mannitol, is a valuable marker for evaluating intestinal permeability. Patients will collect a urine specimen at baseline to assess this biomarker.

  8. CONTINUED SYSTEMIC TREATMENT IN CASES OF PROGRESSIVE DISEASE

    The application of traditional RECIST criteria (Response Evaluation Criteria In Solid Tumors) in patients treated with immunotherapy may lead to premature discontinuation of treatment in a patient who will eventually respond to treatment or have prolonged disease stabilization. Disease progression may occur in extracranial lesions whilst patients may continue to have disease stabilisation or response of their intracranial melanoma disease, and vice versa. The patterns of response to treatment with these immunotherapy agents differ from those with molecularly targeted agents or cytotoxic chemotherapy in several important respects:

    • Patients may have a transient worsening of disease, manifested either by progression of known lesions or the appearance of new lesions, before disease stabilizes or tumour regresses. Therefore caution should be taken in abandoning therapy early. In general these delayed responses are not observed in patients with rapidly progressive, symptomatic disease.
    • Responses can take appreciably longer to become apparent compared with cytotoxic therapy. Continued disease regression is frequently observed well after completion of the initial induction period.
    • Some patients who do not meet traditional criteria for objective response can have prolonged periods of stable disease that are clinically significant.

    An evaluation of data from ipilimumab phase II clinical trials in advanced melanoma found patients characterized as PD at week 12 (by WHO criteria), either by an increase in tumour burden and/or the appearance of new lesions, subsequently experienced an objective response or SD (relative to baseline) without the addition of non-ipilimumab anticancer therapy. Examination of biopsies taken from patients receiving ipilimumab demonstrated that in some small unmeasurable lesions noted at baseline, an increase in size may be interpreted as PD, when instead, this may be due to inflammation due to T cell infiltration.

  9. CONTINUED TREATMENT WITH NIVOLUMAB Patients who are found to have RECIST defined intracranial or extracranial progression (or both) from 6 weeks onwards, and who do not have clinical signs or symptoms of progression, may continue on nivolumab and must have a confirmatory scan within 4 to 6 weeks. The date of the original assessment of progression will be used to record progression, and not the date of the confirmatory imaging. Continued immunotherapy treatment is permitted if the treating clinician determines that the patient is still clinically benefiting from immunotherapy and the patient is willing to continue drug treatment. Consideration may be given to stable or good response extra- or intra- cranially with concurrent progression in the other as a scenario that may warrant further treatment.

There is growing evidence that patients may not need to be treated with immunotherapies indefinitely, or even for as long as the two years commonly studied in clinical trials. Rather, shorter courses of treatment may be just as effective and provide an option for retreatment should a patient progress after coming off a defined period of therapy. Patients who receive 2 years of immunotherapy have the option to cease treatment at this stage, with an option for a rechallenge of immunotherapy at the time of disease progression, if this occurs with 2 years of initial cessation.

03

Conditions studied

  • Melanoma Stage Iv

Keywords

  • Immunotherapy
  • Radiotherapy
  • Brain metastases
  • Stereotactic radiotherapy
  • Stereotactic radiosurgery
  • Cognitive function
  • Neurological-specific cause of death
04

Who can participate

Ages eligible
18 Years to 120 Years
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

  1. Female or male patients, ≥18 years of age.
  2. Signed, written, .
  3. AJCC Stage IV [any T, any N, M1d (0) or M1D(1)] confirmed cutaneous, acral or mucosal unresectable melanoma or unknown primary melanoma and at least 1 radiological definitive that is ≥ 5mm and ≤40mm, measurable per version 1.1 guidelines (modified for brain metastases, enabling up to 5 target lesions in the brain as well as up to 5 extracranial target lesions). There is no upper limit restriction in the number of brain metastases, provided the remaining eligibility criteria are met.
  4. The BRAF mutation status must be available prior to randomisation.
  5. The treating clinician(s) should consider the intracranial disease amenable to stereotactic radiotherapy over whole brain radiotherapy. Patients for whom there is a definite and immediate indication for radiotherapy (e.g. rapidly progressing disease with associated clinical signs and /or symptoms) should not be considered for enrolment.
  6. Brain metastases must be untreated with any modality of radiotherapy or systemic treatment. Previous surgery for melanoma brain metastases is permitted if it resulted in gross total resection and no radiotherapeutic cavity boost was required.
  7. No prior systemic treatment for brain metastases is permitted unless given in the or adjuvant settings for systemic drug the treatment for extracranial disease only. At the time of neoadjuvant or adjuvant systemic therapy for extracranial disease, there should be radiological evidence of the absence of brain metastases. The presenting diagnosis of brain metastases at the time of enrolment in this study must have occurred a minimum of 6 months after stopping neoadjuvant or adjuvant systemic therapy (prior anti PD1, anti , anti CTLA-4, BRAF / MEK inhibitors or clinical trial agents) are acceptable in the setting of neoadjuvant or adjuvant treatment
  8. Asymptomatic from brain metastases at the time of study enrolment without , analgesia or any other treatment for the management of neurological symptoms (with the exception of antiepileptics prescribed for any reason, provided patient is asymptomatic). Resolved neurological symptoms are permitted if complete resolution, without any intervention, has been sustained for a minimum of 7 days prior to randomisation.
  9. (ECOG) Performance Status of 0-2.
  10. A > 30 days.
  11. Able to undergo MRI with Gadolinium contrast agent. CT of the brain is not an acceptable alternative should patients be unable to safely undergo a contrast MRI.
  12. Adequate haematological, hepatic and renal organ function as defined by:

    1. White cell count ≥ 2.0 × 10x9/L
    2. ≥ 1.5 × 10x9/L
    3. ≥ 90 g/L
    4. count ≥ 100 x 10x9/L
    5. Total ≤ 1.5 x
    6. ≤ 3.0 x ULN
    7. Aspartate aminotransferase ≤ 3.0 x ULN
    8. Serum creatinine ≤ 1.5 x the upper limit of normal (ULN). If serum creatinine is > 1.5 x ULN, calculate using standard Cockcroft-Gault formula. Creatinine clearance must be 40ml/min to be eligible.
  13. Women of (WOCBP) must have a negative serum pregnancy test within 7 days of the first dose of study treatment and agree to use effective from 14 days prior to commencing study treatment, throughout the treatment period and for 23 weeks * after the last dose of study treatment. Effective contraception includes:

    1. Intrauterine device with a documented failure rate of less than 1% per year.
    2. Vasectomised partner who is sterile prior to the female partner patient's commencement of study treatment and is the sole sexual partner for that female.
    3. Combined (oestrogen and progestogen) hormonal contraception associated with inhibition of ovulation or progestogen only hormonal contraception associated with inhibition of ovulation.

Women who are not of childbearing potential are defined as any female who has had a documented hysterectomy, bilateral oophorectomy or bilateral tubal ligation or any female who is (≥ one year without menses and >50 years of age in the absence of hormone replacement therapy).

* These durations have been calculated using the upper limit of the half-life for nivolumab (25 days) and are based on the protocol requirement that WOCBP use contraception for 5 half-lives plus 30 days.

Exclusion criteria

Exclusion Criteria

  1. Patients whose intracranial disease changes between the diagnostic MRI scan and the baseline / SRS planning MRI scan and who are no longer suitable for SRS and / or require a specific alternative treatment outside of this protocol.
  2. Melanoma greater than 40mm.
  3. Evidence of , with the exception of pathological findings seen at a previous resection of brain disease, but with no evidence of leptomeningeal disease elsewhere at the time of resection or at study entry.
  4. History of, or current ocular melanoma (patients with mucosal and acral melanoma are eligible).
  5. Neurological symptoms from brain metastases present at baseline (resolved neurological symptoms, prior to enrolment, are permitted).
  6. Prior radiotherapy to the brain (surgery permitted).
  7. Prior systemic drug therapy for melanoma, unless given in the or adjuvant setting and completed 6 months before enrolment in this study.
  8. Patients with active, known or suspected disease. Patients with the following are permitted to enrol:

    1. Vitiligo
    2. Type I diabetes mellitus
    3. Residual hypothyroidism due to an autoimmune condition only requiring hormone replacement
    4. Psoriasis not requiring systemic treatment
    5. Autoimmune conditions not expected to recur in the absence of an external trigger.
  9. Current systemic treatment with , or within 7 days of randomisation, with the exception of prednisone at non- doses of ≤ 10 mg/day (or equivalent, e.g. e.g. prednisone 10mg = dexamethasone 1.6mg = hydrocortisone 40mg). Patients with the following circumstances are permitted to enrol:

    1. Past treatment for non-neurological symptoms allowed, if this was ceased 7 days prior to randomisation
    2. Inhaled or intranasal corticosteroids (with minimal systemic absorption) may be continued if the patient is on a stable dose
    3. Non-absorbed intra-articular steroid injections.

    During the study, treatment with systemic corticosteroids is permitted during radiotherapy if the patient experiences radiation related symptoms but this should be tapered per standard clinical practice as soon as possible and before the next infusion of study drug is due. This also refers to steroids for drug related signs or symptoms.

  10. Any active infection requiring treatment.
  11. A history of interstitial lung disease.
  12. Any concurrent requiring any treatment or a history of another malignancy, unless the patient has been disease-free for 3 years.
  13. Serious or unstable pre-existing medical conditions or other conditions that could interfere with the patient's safety, consent, or compliance.
  14. Pregnant or breastfeeding females.
  15. Administration of any form of within 30 days of starting the trial and during the trial. Administration of any other vaccine is cautionary within 30 days of starting the trial and for the duration of the treatment phase of the trial.
  16. Hypersensitivy to study treatments.
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.

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.

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.

Brain metastases

Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).

Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.

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.

Adjuvant and neoadjuvant

Neoadjuvant treatment is given before the main treatment (usually surgery), often to shrink a tumour. Adjuvant treatment is given after it, to lower the chance of the cancer coming back.

PD-1, PD-L1 and checkpoint inhibitors

PD-1, PD-L1 and CTLA-4 are proteins that act as brakes on the immune system. Checkpoint inhibitors, such as pembrolizumab or nivolumab, block them so the immune system can attack a cancer.

PD-L1 can also be measured in a tumour sample. Some scores count stained tumour cells only (TPS); others also count certain immune cells (CPS). The study names the score and the minimum it uses.

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.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

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.

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.

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.

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.

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.

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.

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).

Leptomeningeal disease

Cancer that has spread to the leptomeninges, the thin layers covering the brain and spinal cord, and the fluid between them. It is not the same as brain metastases.

Criteria often treat it separately, and many studies leave it out even where treated brain metastases are allowed.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

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.

Live vaccines

Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
218 participants (estimated)

Study arms

  • Active comparator
    Nivolumab + ipilimumab

    Nivolumab 1mg/kg and ipilimumab 3mg/kg Q3W x 4 doses, then nivolumab 480 mg every 4 weeks. Any form of salvage therapy (surgery or radiotherapy) may be administered to either cohort for the treatment of intracranial disease progression.

    Drug: Ipilimumab · Drug: Nivolumab · Other: Salvage therapy

  • Active comparator
    Nivolumab + ipilimumab,concurrent SRS

    Nivolumab 1mg/kg and ipilimumab 3mg/kg Q3W x 4 doses, then nivolumab 480 mg every 4 weeks. Stereotactic radiotherapy 16 to 22 Gy in 1 fraction or 24 to 30 Gy, hypofractionated for larger lesions. Stereotactic radiotherapy to commence within 7 days of of the baseline / planning MRI brain. Hypofractionated stereotactic radiotherapy should be completed within 14 day of the first fraction. Any form of salvage therapy (surgery or radiotherapy) may be administered to either cohort for the treatment of intracranial disease progression.

    Drug: Ipilimumab · Drug: Nivolumab · Radiation: Stereotactic Radiotherapy · Other: Salvage therapy

Interventions

  • Ipilimumab 3mg per kg every 3 weeks for 4 doses

    Also known as: Yervoy

  • Nivolumab 1mg/kg every 3 weeks for 4 doses, then 480mg every 4 weeks.

    Also known as: Opdivo

  • RadiationStereotactic Radiotherapy

    The first dose of immunotherapy Must be given prior to the start of radiotherapy. One fraction at between 16 to 22 Gy or 24 to 30 Gy hypofractionated for larger lesions.

  • OtherSalvage therapy

    Any form of salvage therapy (surgery or radiotherapy) for intracranial disease progression, further disease control at any site, symptom control or treatment of cerebral haemorrhage or cerebral radionecrosis.

06

What researchers measure

Primary outcomes

  1. Neurological specific cause of death

    Proportion of patients dead at one year from randomisation and whose immediate cause of death is neurological.

    Time frame: One year

Secondary outcomes

  1. Intracranial response rate

    The best response in intracranial metastases as measured using brain modified (bm) RECIST, following at least ONE dose of nivolumab and ipilimumab and based on imaging from week 6 onwards and confirmed a minimum of 4 weeks later.

    Time frame: Up to 10 years

  2. Extracranial response rate

    The best response in extracranial disease for each patient measured using bm RECIST, following at least ONE dose of nivolumab and ipilimumab and based on imaging from week 12 onwards.

    Time frame: Approximately 10 years

  3. Overall response rate

    Proportion of patients with an overall complete or partial response as measured using bm RECIST following at least ONE dose of nivolumab and ipilimumab and based on imaging from week 12 onwards .

    Time frame: Up to 10 years

  4. Overall progression free survival

    Time from the start of study treatment to the date of any progression of disease as measured using bm RECIST and based on imaging from week 12 onwards.

    Time frame: 1, 2, 5 and 10 years

  5. Non-Neurological specific cause of death

    Proportion of patients dead at one year from randomisation and whose immediate cause of death was due to melanoma but from causes other than brain metastases.

    Time frame: Up to 10 years

  6. Overall survival

    Time from commencing study treatment to the date of death from any cause. Patients still alive at the end of the study will be censored at the date of their last assessment.

    Time frame: 1, 2, 5 and 10 years.

  7. Incidence of radionecrosis

    Proportion of patients with a diagnosis of radionecrosis occuring within 5 years of the start of the first course of radiotherapy.

    Time frame: 5 years

  8. Requirement for salvage radiotherapy

    Proportion of patients requiring salvage radiotherapy in each cohort

    Time frame: 1 year

  9. Requirement for salvage intracranial surgery

    Proportion of patients requiring salvage craniotomy in each cohort

    Time frame: 1 year

  10. Change in neurocognitive function scores

    The mean change from baseline assessment of neurocognitive function to the time of clinical response, stable disease and progression of disease.

    Time frame: Up to 10 years

  11. Description of impaired neurological function and neurological adverse events

    Description of the nature of impaired function and types of neurological adverse events.

    Time frame: Up to 10 years

  12. Time to neurological deterioration

    The time from starting immunotherapy to the time of deterioration of MoCA, CTCAE and FACT-Br.

    Time frame: Up to 10 years

  13. Duration of neurological deterioration

    The time to resolution (if any) of each functional neurocognitive deficit.

    Time frame: Up to 10 years

  14. Patient rated quality of life

    Time from starting study treatment to the time of deterioration in quality life scores and the duration of deterioration.

    Time frame: Up to 10 years

  15. Functional performance status

    Incidence of reduced functional performance by 1, 2 or 3 grades of the Eastern Cooperative Oncology Group (ECOG) performance status scale compared to baseline.

    Time frame: Up to 10 years

  16. Adverse events

    Description of all adverse events per National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE) version 5.0

    Time frame: Up to 10 years

  17. Tissue, blood and gut biomarkers of response, progression and toxicity

    Correlation of the baseline PD-L1 status, immune markers, genomics and other biomarkers in tumour tissue and blood and the composition and diversity of the gut microbiome with RECIST response and toxicity. Correlation of gastrointestinal mucosal integrity with bacterial composition in stool samples, RECIST response and immune related adverse events.

    Time frame: Up to 10 years

07

Study locations

8 of 9 sites recruiting
  • Westmead Hospital
    Sydney, New South Wales 2145, Australia
    Recruiting
    • Matteo Carlino · Contact
    • Matteo Carlino · Principal investigator
  • Calvary Mater NewcastleHospital
    Waratah, New South Wales 2298, Australia
    Recruiting
    • Andre van der Westhuizen · Contact
  • Melanoma Institute Australia
    Wollstonecraft, New South Wales 2065, Australia
    Recruiting
  • Princess Alexandra Hospital
    Woolloongabba, Queensland 4102, Australia
    Recruiting
    • Victoria Atkinson · Principal investigator
  • Royal Adelaide Hospital
    Adelaide, South Australia 5000, Australia
    Recruiting
    • Michael Brown · Contact
  • Peter MacCallum Cancer Centre
    East Melbourne, Victoria 3002, Australia
    Recruiting
    • Grant McArthur · Principal investigator
  • Alfred Hospital
    Melbourne, Victoria 3004, Australia
    Recruiting
    • Andrew Haydon, MBBS · Contact
  • Sir Charles Gairdner Hosptial
    Perth, Western Australia 6009, Australia
    Recruiting
    • Tarek Meniawy · Contact
  • Oslo Univesity Hospital Radiumhospitalet
    Oslo, Oslo 0379, Norway
    Terminated

    Not enrolling at this site.

08

References and documents

Publications

  • Phillips WJ, Baghai T, Ong M, Lo B, Ibrahim AM, Smith TKT, Song X. A Contemporary Report of Clinical Outcomes in Patients with Melanoma Brain Metastases. Curr Oncol. 2021 Jan 13;28(1):428-439. doi: 10.3390/curroncol28010045. PubMed 33450821 ↗

Individual participant data

Plan to share: No

09

Timeline

1 registry update since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedDate before it movedWhere the date was before it movedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Aug 2019 (actual). Primary completion is estimated for Dec 2026, 88 months after the start.

Of 278 non-industry phase 2 interventional studies under Melanoma, half reached primary completion within 67 months of starting (the median), counting those still running; a quarter within 41 and three quarters within 94. This study's planned 88 months is above that.

Counting every sponsor, half of 384 studies reached it within 53 months; a quarter within 32 and three quarters within 90.

Primary completion moved once since we started tracking on Sep 25, 2026: Aug 2026 → Dec 2026, on Oct 8, 2026.

Earlier changes are on the record history on ClinicalTrials.gov ↗

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

Registered
Aug 28, 2017
First posted
Nov 13, 2017
StartActual
Aug 14, 2019
Primary completionEst.
Dec 2026was Aug 2026
CompletionEst.
Aug 2029
Last update
Oct 8, 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.
Primary completion
Aug 2026→Dec 2026
Oct 8, 2026
Show all 1 update
  1. Oct 8, 2026
    Primary completion Aug 2026→Dec 2026
    + 1 other change: verification date

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT03340129
Lead sponsor
Melanoma Institute Australia
Responsible party
Sponsor
First posted
Nov 13, 2017
Start date
Aug 14, 2019
Primary completion
Dec 2026 (estimated)
Completion
Aug 2029 (estimated)
Last update
Oct 8, 2026

Study contacts

Georgina V Long, MBBS PhD
Contact
info@melanoma.org.au
+61 2 9911 7200
Maria Gonzalez, RN MHSc
Contact
maria.gonzalez@melanoma.org.au
+61 2 9911 7200
Georgina V Long, MBBS PhD
study chair · Melanoma Institute Australia

Oversight

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

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