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RecruitingLast updated: 11 June 2026

ARET2121: Testing whether adding a medicine called melphalan, given directly into the eye, can make early treatment more effective for treatment with retinoblastomaIntravitreal Melphalan for Intraocular Retinoblastoma

Trial purpose

Medical clipboardCancer treatment

Tumor type

Multi-Cancer Multi-Cancer

Age

People0 - 18

Trial acronym

ARET2121

Clinical summary

Summary

This study is looking at whether adding a medicine called melphalan, given directly into the eye, can make early treatment more effective for children with retinoblastoma. Retinoblastoma is a cancer that starts in the retina - the part of the eye that helps us see.

Some children with retinoblastoma develop vitreous seeds, which are cancer cells floating in the jelly-like center of the eye. Those seeds can make the cancer harder to treat, and there is a higher chance the cancer may not respond well or may come back.

Researchers want to find out whether using melphalan together with standard chemotherapy at the start of treatment can better control these vitreous seeds.

This study uses cycles of chemotherapy and, for some patients, injections of melphalan into the eye. Treatment is given in stages, and doctors regualrly check how the eye is responding.

Cycles 1-2: Standard chemotherapy (CVE)
During the first two cycles (each cycle is 28 days long), patients receive three chemotherapy medicines:

  • Carboplatin intravenously (IV) on Days 1 and 2
  • Vincristine IV on Day 1
  • Etoposide IV on Days 1 and 2

These medicines together are called the CVE regimen.

Patients have an eye exam under anesthesia (EUA) at the start of the study and before each cycle. An ultrasound of the eye (UBM) is done once before the first cycle. Urine samples are collected at the starts of the study and during treatment. Treatment continues for up to 2 cycles, as long as the cancer is not getting worse and side effects are manageable.

Cycle 3 onwards: Chemotherapy and possible melphalan
From cycle 3 onwards, patients continue receiving the same CVE chemotherapy as in Cycles 1 and 2.

Before each cycle, patients get an EUA to decide if melphalan can be safely given. If eligible, the patient receives one melphalan injection into the eye sometime between 14 days before to 14 days after the start of the cycle.

If a patient is not eligible in a given cycle, they simply continue CVE chemotherapy for that cycle. Treatment may continue for up to 4 cycles of CVE during thsi stage. Some patients may receive up to 6 melphalan injections total if the doctor believes they will benefit.

Uring samples will also be collected during these cycles. Patients also have MRI scans and may have small samples of eye fluid or tissue collected throughout the trial.

After treatment ends
When all study treatment is complete, patients return for follow-up:

  • 4 weeks after finishing treatment
  • Then every 3 months for 1 year
  • Then every 3-6 months for years 2-5

These visits help doctors monitor the eye, check for any signs the cancer has returned, and watch for long-term effects.

 

Conditions

This trial is treating people with retinoblastoma

Eligibility

Inclusion

  • Patient must be < 18 years of age at enrollment
  • Patient must have newly diagnosed intraocular (localized) retinoblastoma and meet one of the following criteria:

    • Unilateral Group D retinoblastoma with vitreous seeding; OR
    • Bilateral retinoblastoma with worst eye Group D, with vitreous seeding present and the contralateral eye is Group A-C; OR
    • Bilateral retinoblastoma with one Group D eye with vitreous seeding and one Group E eye where the Group E eye has been enucleated prior to any therapy. Note exclusion for high-risk features
  • Patients must have a performance status corresponding to Eastern Cooperative Oncology Group (ECOG) scores of 0, 1 or 2. Use Karnofsky for patients > 16 years of age and Lansky for patients =<16 years of age
  • Peripheral absolute neutrophil count (ANC) >= 750/uL (must be performed within 7 days prior to enrollment unless otherwise indicated)
  • Platelet count >= 75,000/uL (transfusion independent) (must be performed within 7 days prior to enrollment)
  • A serum creatinine based on age/gender as follows (must be performed within 7 days prior to enrollment; must be repeated prior to the start of protocol therapy if > 7 days have elapsed from their most recent prior assessment):

    • 1 month to < 6 months = 0.4 (male and female)
    • 6 months to < 1 year = 0.5 (male and female)
    • 1 to < 2 years = 0.6 (male and female)
    • 2 to < 6 years = 0.8 (male and female)
    • 6 to < 10 years = 1.0 (male and female)
    • 10 to < 13 years = 1.2 (male and female)
    • 13 to < 16 years = 1.5 (male) and 1.4 (female)
    • >= 16 years = 1.7 (male) and 1.4 (female) OR - a 24-hour urine Creatinine clearance >= 70 mL/min/1.73 m^2 OR - a glomerular filtration rate (GFR) >= 70 mL/min/1.73 m^2. GFR must be performed using direct measurement with a nuclear blood sampling method OR direct small molecule clearance method (iothalamate or other molecule per institutional standard)
    • Note: Estimated GFR (eGFR) from serum creatinine, cystatin C or other estimates are not acceptable for determining eligibility

      • For patients < 1 month of age, serum creatinine levels must be < 1.5 x the treating institution's creatinine upper limit of normal (ULN) for patients < 1 month of age or the creatinine clearance or radioisotope GFR must be >= 70 mL/min/1.73 m^2
  • Total bilirubin =< 1.5 x upper limit of normal (ULN) for age (must be performed within 7 days prior to enrollment; must be repeated prior to the start of protocol therapy if > 7 days have elapsed from their most recent prior assessment)
  • Serum glutamate pyruvate transaminase (SGPT) (alanine aminotransferase [ALT]) =< 135 U/L (must be performed within 7 days prior to enrollment; must be repeated prior to the start of protocol therapy if > 7 days have elapsed from their most recent prior assessment)

    • Note: For the purpose of this study, the ULN for SGPT (ALT) has been set to the value of 45 U/L

Exclusion

  • Patients with evidence of metastatic or extra-orbital spread
  • Patients must not have an invasive infection at time of protocol entry
  • Patients must not have had any prior anti-cancer therapy to the study eye(s), including focal, local, or systemic chemotherapy or radiation therapy

    • Note: A study eye is defined as being Group D with vitreous seeding. Patients may have had enucleation of one eye as long as the remaining eye is Group D with vitreous seeds
  • Patients with no reasonable expectation for any useful vision in the Group D eye as determined by the treating physician
  • Patients with bilateral disease who undergo enucleation of a Group E eye prior to initiation of therapy and show evidence of high-risk histopathology features in the enucleated eye. High-risk histopathology includes choroid involvement >= 3 mm, post lamina optic nerve involvement, full thickness scleral invasion or optic nerve invasion to the cut end
  • Female patients who are pregnant since fetal toxicities and teratogenic effects have been noted for several of the study drugs. A pregnancy test is required for female patients of childbearing potential
  • Lactating females who plan to breastfeed their infants
  • Sexually active patients of reproductive potential who have not agreed to use an effective contraceptive method for the duration of their study participation
  • All patients and/or their parents or legal guardians must sign a written informed consent
  • All institutional, Food and Drug Administration (FDA), and National Cancer Institute (NCI) requirements for human studies must be met

Inclusion

  • Your cancer has not spread to other parts of the body (localised).

Exclusion

  • You have certain types of non-cancer medical conditions.
  • You have had certain treatments, surgical procedures or drugs.
Message

Clinical trials have complex eligibility criteria, and other criteria may apply for this trial. Ask your doctor about whether this trial could be right for you.

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More information

Trial Identifiers

Information on this page is partially produced from ClinicalTrials.gov *. View further details about this trial on the registry via the links below:

Trial sponsor

Children's Oncology Group

Scientific Title

Intravitreal Melphalan for Intraocular Retinoblastoma

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